March 11, 2015

Top 40 Twins Prospects of 2015: System Overview

Also in this series: 1-5, 6-10 11-15, 16-20, 21-25, 26-30, 31-35, 36-40.

Sano-Buxton

My annual series ranking and profiling the Twins' top prospects concluded last week, so here's the complete list of 40 players along with links to each individual write-up and an overview of the farm system as a whole:

 1. Byron Buxton, CF               21. Jake Reed, RP
 2. Miguel Sano, 3B                22. Travis Harrison, LF
 3. Jose Berrios, SP               23. Zack Jones, RP
 4. Alex Meyer, SP                 24. Mitch Garver, C
 5. Kohl Stewart, SP               25. Aaron Slegers, SP
 6. Nick Gordon, SS                26. Max Murphy, CF
 7. Jorge Polanco, SS              27. Brandon Peterson, RP
 8. Lewis Thorpe, SP               28. Stuart Turner, C
 9. Nick Burdi, RP                 29. Tyler Jones, RP
10. Eddie Rosario, CF              30. Jason Wheeler, SP
11. Trevor May, SP                 31. Tyler Duffey, SP
12. Stephen Gonsalves, SP          32. Sam Clay, RP
13. Amaurys Minier, LF             33. Tanner English, CF
14. Michael Cederoth, SP           34. Ryan Eades, SP
15. Max Kepler, CF                 35. J.R. Graham, RP
16. Michael Tonkin, RP             36. Lester Oliveros, RP
17. Adam Walker, RF                37. Stephen Pryor, RP
18. Taylor Rogers, SP              38. Levi Michael, 2B
19. Chih-Wei Hu, SP                39. Logan Darnell, SP
20. Lewin Diaz, 1B                 40. A.J. Achter, RP

This time last year the Twins' farm system was widely regarded as baseball's best. And then the injuries struck. Elbow surgery knocked out Miguel Sano for the entire season and wrist problems followed by a concussion cost Byron Buxton most of the year. Four of the system's top pitching prospects--Alex Meyer, Jose Berrios, Kohl Stewart, and Lewis Thorpe--all experienced some arm issues. And while not an injury, Eddie Rosario missed 50 games on a suspension.

All the injuries put a dent in the system's overall standing, but it remains one of the two or three best in baseball thanks largely to Buxton and Sano retaining their elite-prospect status. Adding a third consecutive top-five draft pick in high school shortstop Nick Gordon also helped prop up the group and second-round pick Nick Burdi's impressive pro debut combined with perceived MLB readiness put him squarely on the prospect map right away.

In most years several of the Twins' top prospects graduate to the majors--Oswaldo Arcia, Aaron Hicks, and Kyle Gibson all did so in 2013, for instance--but Josmil Pinto was the only member of the 2014 top 10 to spend enough time in Minnesota to lose his prospect eligibility. Retaining or losing "prospect" status doesn't change a player's long-term value, but it does greatly impact how a farm system is perceived and the lack of 2014 graduates gives the system a boost for 2015.

Last season also showed the importance of depth beyond the big names and top-100 list regulars, as Danny Santana and Kennys Vargas emerged as potential building blocks for the Twins after being relative afterthoughts coming into 2014. Jorge Polanco also took a sizable step forward, which combined with Santana's shockingly impressive debut and the addition of Gordon gives the Twins some young middle infield talent to get excited about for the first time in a long time.

Buxton and Sano remain the crown jewels of the farm system, but pitching dominates the rest of the top 40 and that makes sense given the Twins' multi-year focus on adding arms via trades and high-round draft picks after the cupboard was left alarmingly bare. In years past the Twins were typically overflowing with back-of-the-rotation starters, but now even after the high-upside quartet of Berrios, Meyer, Stewart, and Thorpe they have several intriguing mid-rotation types.

They also have an assortment of hard-throwing, bat-missing relievers approaching MLB readiness in Burdi, Michael Tonkin, Jake Reed, Zack Jones, Brandon Peterson, and Tyler Jones. It may not fully come together in 2015, but there are finally power arms on the way to Minnesota and in general the farm system looks nearly ready to start making a significant MLB impact after years of stockpiling talent in the minors.

Of the top 11 prospects all but Stewart, Gordon, and Thorpe have a realistic shot of playing in the majors this season, led by Buxton, Sano, and Meyer potentially playing big roles. That means next year's farm system may plummet in the MLB-wide rankings, but far more importantly it means this could be the year fans stop hearing about the trade pickups, high draft picks, and big-money international signings rising through the minors and start actually seeing them at Target Field.


This week's blog content is sponsored by the Minnesota Corn Growers Association, which is hosting a Twins season ticket giveaway contest on their website, MNFarmTeam.com.

March 4, 2015

Top 40 Twins Prospects of 2015: 5, 4, 3, 2, 1

Also in this series: 6-10, 11-15, 16-20, 21-25, 26-30, 31-35, 36-40.

5. Kohl Stewart | Starter | DOB: 10/94 | Throws: Right | Draft: 2013-1

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2013     RK-     6      3     1.69      16.0      12      0      16      3
         RK+     1      1     0.00       4.0       1      0       8      1
2014     A-     19     19     2.59      87.0      75      4      62     24

Considered the top high school prospect in the 2013 draft, the Twins selected Texas right-hander Kohl Stewart fourth overall after college stars went 1-2-3. On draft day scouting director Deron Johnson described Stewart's ceiling as "unlimited" and he signed for $4.5 million, bypassing a chance to follow in Johnny Manziel's footstep as Texas A&M's quarterback. Stewart had a great pro debut with a 1.35 ERA and 24/4 K/BB ratio in 20 rookie-ball innings.

He moved up to low Single-A last season and on the surface Stewart had similar success, posting a 2.59 ERA in 19 starts and holding opponents to a .233 batting average. However, he managed just 62 strikeouts in 87 innings, struggled to maintain peak fastball velocity, and was shut down with shoulder problems. High school pitchers make risky top-10 picks for a reason and Stewart failed to crack Baseball America's annual top-100 prospects list after placing 52nd last year.

Along with the sub par strikeout rate he did induce plenty of ground balls and allow just 17 total extra-base hits in 360 plate appearances, so if the shoulder issues prove minor Stewart's first full season was hardly a disaster. If not for the hype attached with being a top-five pick simply holding his own against low Single-A hitters as an 19-year-old with 20 post-high school innings under his belt would be very encouraging.

4. Alex Meyer | Starter | DOB: 1/90 | Throws: Right | Trade: Nationals

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2012     A-     18     18     3.10      90.0      68      4     107     34
         A+      7      7     2.31      39.0      29      2      32     11
2013     AA     13     13     3.21      70.0      60      3      84     29
2014     AAA    27     27     3.52     130.1     116     10     153     64

Acquired from the Nationals in exchange for Denard Span two offseasons ago, Alex Meyer was the 23rd pick in the 2011 draft out of the University of Kentucky and the 6-foot-9 right-hander with a mid-90s fastball has a 3.14 ERA with 420 strikeouts in 364 innings as a pro. Last year he made 27 starts at Triple-A and struck out 153 in 130 innings, leading the International League in strikeouts and strikeout rate. Yet he's already 25 years old and hasn't debuted in the majors.

Poor control and some nagging arm issues have certainly delayed Meyer's arrival to the majors, but when a last-place team has a top-50 prospect make 27 starts at Triple-A as a 24-year-old that rightfully raises eyebrows. For some context: In the majors last season 750 games were started by a pitcher younger than Meyer and he's less than six months older than Madison Bumgarner. Meyer is a very good prospect who's almost too old to be considered a very good prospect.

Meyer has an overpowering fastball that approaches triple-digits, his slider and knuckle-curveball receive praise, and his changeup is said to be improving. And coming from a 6-foot-9 frame adds a little extra to every pitch. If he can stay healthy and harness his dominant raw stuff Meyer has top-of-the-rotation potential, but shifting to the bullpen to unleash his fastball even further gives him a late-inning relief role to fall back on if needed.

3. Jose Berrios | Starter | DOB: 5/94 | Throws: Right | Draft: 2012-1

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2012     RK-     8      1     1.08      16.2       7      0      27      3
         RK+     3      3     1.29      14.0       8      1      22      1
2013     A-     19     19     3.99     103.2     105      6     100     40
2014     A+     16     16     1.96      96.1      78      4     109     23
         AA      8      8     3.54      40.2      33      2      28     12

Jose Berrios was the Twins' "other" 2012 first-round pick, going 30 spots after Byron Buxton in the compensatory slot received for losing Michael Cuddyer via free agency. He's six-foot-nothing on a good day, but Berrios regularly works in the mid-90s with his fastball and complements it with a good curveball and changeup. Not yet 21 years old, he spent much of 2014 at Double-A, made a cameo at Triple-A, and was named the Twins' minor league pitcher of the year.

Berrios dominated high Single-A hitters to begin last season, starting 16 games with a 1.96 ERA and 109/23 K/BB ratio in 96 innings while holding opponents to a .218 batting average. He was one of just three 20-year-olds to make at least 15 starts in the Florida State League and then in July he moved up to Double-A, where he was the youngest pitcher in the Eastern League to throw more than 40 innings.

Even with a poor season-ending start at Triple-A included his overall numbers were brilliant for a 20-year-old, with a 2.77 ERA and 140/38 K/BB ratio in 140 innings. Berrios is often overshadowed within the Twins' system, but he'd be the No. 1 prospect for a lot of teams and could be knocking on the door to the majors in the second half. It's subjective, of course, but Berrios' mix of upside and polish makes him arguably the Twins' top pitching prospect since Matt Garza in 2007.

2. Miguel Sano | Third Base | DOB: 5/93 | Bats: Right | Sign: Dominican

YEAR     LV      PA      AVG      OBP      SLG     HR    XBH     BB     SO
2012     A-     553     .258     .373     .521     28     60     80    144
2013     A+     243     .330     .424     .655     16     33     29     61
         AA     276     .236     .344     .571     19     37     36     81
2014

As a 20-year-old Miguel Sano destroyed Single-A and was one of the best hitters at Double-A in 2013, hitting .280/.382/.610 with 35 homers and 65 walks. Last spring he arrived in Fort Myers on the verge of the majors, but elbow problems that first popped up during winter ball worsened early in camp and Sano underwent Tommy John surgery. He missed the entire season, losing a crucial year of development at age 21, and must now re-establish himself as an elite prospect.

Sano's chances of sticking at third base always seemed iffy given his 6-foot-5, 250-pound frame and now his arm strength, which had been his main asset defensively, may be diminished by the elbow surgery. The good news is that Sano's upside offensively is high enough that even being forced to move from third base to right field or first base would leave plenty of room for stardom, although he certainly also has lots to prove at the plate following a lost year.

You won't find prospects with more power potential than Sano, but his .268 batting average and 286 strikeouts in 252 games above rookie-ball are possible red flags. Or at least reasons to pause dreams about Sano turning into the next Miguel Cabrera. There are only six active right-handed hitters with a batting average below .270 and an OPS above .800: Edwin Encarnacion, Jose Bautista, Nelson Cruz, Josh Donaldson, Carlos Quentin, and Mike Napoli.

1. Byron Buxton | Center Field | DOB: 12/93 | Bats: Right | Draft: 2012-1

YEAR     LV      PA      AVG      OBP      SLG     HR    XBH     BB     SO
2012     RK-    102     .216     .324     .466      4     11     11     26
         RK+     87     .286     .368     .429      1      8      8     15
2013     A-     321     .341     .431     .559      8     33     44     56
         A+     253     .326     .415     .472      4     16     32     49
2014     A+     134     .240     .313     .405      4     10     10     33

This time last year Byron Buxton was MLB's consensus No. 1 prospect after hitting .334 with 49 extra-base hits, 55 steals, and 76 walks between two levels of Single-A as a 19-year-old. Then a spring training wrist injury that was supposed to be minor knocked him out for most of the first half. He returned to Single-A for 30 games and hit just .240, at which point the Twins promoted him to Double-A and he suffered a concussion from a brutal outfield collision in his first game.

While not a totally lost season like Miguel Sano experienced, Buxton played poorly when not sidelined by two significant injuries and now faces the same post-concussion question marks that loomed over Joe Mauer, Justin Morneau, and Denard Span. The good news is Buxton is still just 21 years old. He'll begin this season as one of the youngest players at Double-A or Triple-A and could be the first 21-year-old with 100 plate appearances for the Twins since Mauer in 2004.

Thanks to the rough 2014 he's no longer MLB's consensus No. 1 prospect, but Buxton still claims the top spot on several prominent lists and holds a top-three spot everywhere. Upsides simply do not get much higher than a Gold Glove center fielder with a middle-of-the-order bat and 50-steal speed, and before the injuries he showed more plate discipline and power than expected in the early stages of his development. He has franchise-lifting talent if he can just stay healthy.


For a lengthy discussion about what to expect from Miguel Sano following a lost season, check out this week's "Gleeman and The Geek" episode.

February 27, 2015

Top 40 Twins Prospects of 2015: 10, 9, 8, 7, 6

Also in this series: 1-5, 11-15, 16-20, 21-25, 26-30, 31-35, 36-40.

10. Eddie Rosario | Center Field | DOB: 9/91 | Bats: Left | Draft: 2010-4

YEAR     LV      PA      AVG      OBP      SLG     HR    XBH     BB     SO
2012     A-     429     .296     .345     .490     12     48     31     69
2013     A+     231     .329     .377     .527      6     24     17     29
         AA     313     .284     .330     .412      4     26     21     67
2014     A+      34     .300     .382     .300      0      0      4      5
         AA     336     .237     .277     .396      8     31     17     68

After a strong 2013 it took less than one week for things to get ugly for Eddie Rosario in 2014. In early January he was suspended 50 games for a second positive marijuana test, causing him to sit out until late May. When he returned the Twins demoted him back to high Single-A despite his playing 70 games at Double-A the previous season. And then when a promotion pushed him up to Double-A again in June he hit .237/.277/.396 with an ugly 68/17 K/BB ratio in 79 games there.

Oh, and after two years trying to convert him to second base the Twins basically gave up on that project and played Rosario mostly in the outfield. Because of his limited center field defense and Byron Buxton's presence he's never going to be the Twins' long-term starter there, which means Rosario will have to put his plus speed to good use in a corner spot and prove that his bat can be an asset in a place often home to sluggers.

So far he hasn't done that, hitting .260/.302/.403 with 12 homers and a 135/38 K/BB ratio in 149 games at Double-A. Rosario is still just 23 years old, so there's time for his power and/or plate discipline to develop further, but right now his offensive game revolves around batting average. Starting strong could get Rosario called up to the Twins by midseason and the good news is that being added to the 40-man roster means he's no longer subject to testing for marijuana usage.

9. Nick Burdi | Reliever | DOB: 1/93 | Throws: Right | Draft: 2014-2

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2014     A-     13      0     4.15      13.0       8      0      26      8
         A+      7      0     0.00       7.1       5      0      12      2

In recent years the Twins have gone very heavy on drafting hard-throwing college relievers and the returns have been underwhelming so far. That could change with Nick Burdi, their hardest-throwing college reliever yet. His college numbers at Louisville were video game-level ridiculous, with a 0.62 ERA and 127 strikeouts in 73 innings for 2013/2014, and Baseball America's pre-draft scouting report unequivocally called him "the hardest thrower in college baseball."

He was originally drafted by the Twins in the 24th round out of high school and they picked him again last year, this time 46th overall. He signed for $1.2 million and skipped rookie-ball, starting his pro career at low Single-A and quickly moving up to high Single-A. Between the two levels the 6-foot-5 right-hander racked up an incredible 38 strikeouts in 20 innings while regularly cracking 100 miles per hour. His low-90s slider (yes, low-90s slider) is considered a plus pitch too.

College relievers in other organizations tend to move quickly through the minors and while the Twins in general tend to hold back their draft picks Burdi making it to Fort Myers already is a sign they have him on the fast track. As you might expect from a triple-digit thrower his control needs a lot of work, but his walk rate is merely bad and not disastrous. Burdi could be the first pitcher to truly usher the Twins into the modern era of high-velocity arms and he could do it in 2015.

8. Lewis Thorpe | Starter | DOB: 12/95 | Throws: Left | Sign: Australia

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2013     RK-    12      8     2.05      44.0      32      2      64      6
2014     A-     16     16     3.52      71.2      62      7      80     36

Lewis Thorpe was signed out of Australia by the Twins for $500,000 as a 16-year-old and one year later he dominated rookie-ball hitters in his pro debut, racking up 64 strikeouts versus six walks in 44 innings. Convinced he was ready for full-season competition, the Twins had Thorpe skip advanced rookie-ball and sent him to low Single-A as an 18-year-old. Not surprisingly he got off to a rough start, allowing 13 runs in his first 18 innings.

Thorpe turned things around quickly and finished the season with a 12-start stretch in which he posted a 2.52 ERA and 73/26 K/BB ratio in 54 innings while holding opponents to a .213 batting average. Those great numbers become spectacular numbers when you consider he was the only 18-year-old in the entire Midwest League to throw at least 70 innings and the average age of the hitters he faced was 22.

Things came to a screeching halt in September when Thorpe was diagnosed with a sprained ulnar collateral ligament in his elbow, which can often lead to Tommy John surgery. He skipped pitching winter ball in Australia and is expected to be ready for Opening Day, but given the Twins' recent history with such things it's hard not to be pessimistic. If healthy Thorpe has top-of-the-rotation upside and his performance at such a young age really stands out.

7. Jorge Polanco | Shortstop | DOB: 7/93 | Bats: Switch | Sign: Dominican

YEAR     LV      PA      AVG      OBP      SLG     HR    XBH     BB     SO
2012     RK+    204     .318     .388     .514      5     22     20     26
2013     A-     523     .308     .362     .452      5     47     42     59
2014     A+     432     .291     .364     .415      6     29     46     60
         AA     157     .281     .323     .342      1      7      9     28

When the Twins needed emergency infield depth they surprisingly called up Jorge Polanco from Single-A one week before his 21st birthday, making him the youngest position player to debut for the team since Joe Mauer in 2004 and just the second to do so before turning 21 since 1980. He ended up starting just one game for the Twins, spending most of the season at Single-A before moving up to Double-A for the final six weeks.

Polanco did his usual thing in Fort Myers, hitting for a strong batting average and modest power while controlling the strike zone. He hit .281 following the promotion to Double-A, but it came with very little power and a poor 28/9 K/BB ratio in 37 games. He was one of the youngest players in the Eastern League, so simply holding his own for New Britain was an accomplishment. Polanco also resumed playing mostly shortstop after playing more second base than shortstop in 2013.

His raw numbers aren't eye-popping, but Polanco has moved quickly through the system while faring well and moving him back to shortstop is a positive long-term sign for his defensive value regardless of which position he ends up calling home. He projects as a solid player on both sides of the ball and that hasn't been said about many Twins middle infield prospects for a long time. Despite his early debut Polanco may not factor into the Twins' plans until 2016.

6. Nick Gordon | Shortstop | DOB: 10/95 | Bats: Left | Draft: 2014-1

YEAR     LV      PA      AVG      OBP      SLG     HR    XBH     BB     SO
2014     RK+    255     .294     .333     .366      1     11     11     45

For the third time in three years the Twins had a top-five pick and used it on a high school player, taking Florida shortstop Nick Gordon. His father, Tom Gordon, was a three-time All-Star pitcher with 21 seasons in the majors and his brother, Dee Gordon, led the majors in stolen bases last season and is currently the Marlins' starting second baseman. Nick Gordon signed for $3.85 million as the fifth overall pick and made his pro debut in advanced rookie-ball.

He got off to a fast start and then cooled down, finishing at .294/.333/.366 with one homer in 57 games. His lack of power was expected, although Baseball America's pre-draft scouting report was convinced his swing has the potential to develop more pop. Gordon was raw at the plate, striking out 45 times compared to 11 walks, and he was successful on just 11 of 18 steal attempts while showing speed that's several notches below his brother.

By drafting Gordon at No. 5 despite a lack of big-time offensive upside the Twins clearly think he has a chance to be a plus defensive shortstop with a solid bat, which is a tough combo to find as Twins fans know all too well. However, outside the organization opinions on his long-term ability to play shortstop seem mixed and as a second baseman Gordon's skill set is far less promising. Last time the Twins used a top-10 pick on a high school shortstop: Michael Cuddyer in 1997.


For a lengthy discussion of the Twins' top 10 prospects, including all five players listed above, check out this week's "Gleeman and The Geek" episode.

February 23, 2015

Top 40 Twins Prospects of 2015: 15, 14, 13, 12, 11

Also in this series: 1-5, 6-10, 16-20, 21-25, 26-30, 31-35, 36-40.

15. Max Kepler | Center Field | DOB: 2/93 | Bats: Left | Sign: Germany

YEAR     LV      PA      AVG      OBP      SLG     HR    XBH     BB     SO
2012     RK+    269     .297     .387     .539     10     31     27     33
2013     A-     263     .237     .312     .424      9     23     24     43
2014     A+     407     .264     .333     .393      5     31     34     62

As a 16-year-old Max Kepler was big and fast with lots of tools and a unique background that included his parents meeting as performers in the German ballet, so when the Twins signed him out of Germany for $800,000 he was viewed as an intriguing, high-upside prospect. Five seasons later some of that intrigue and upside have vanished, in part because Kepler has struggled to stay healthy and in part because his performance beyond rookie-ball has underwhelmed.

Kepler played 163 games at Single-A during the past two seasons, hitting .253/.325/.405 with 14 homers. He also seems less and less likely to stick in center field, playing quite a bit of right field and first base. On the other hand Kepler was one of the Florida State League's youngest regulars last season at age 21, so even holding his own there is a positive sign. And after a bad first three months Kepler finished the year on a high note by hitting .303/.359/.442 in July and August.

Kepler is no longer incredibly young and no longer oozes upside, so now he simply needs to start hitting and in particular turn his 6-foot-4 frame and power potential into actual homers. Despite not playing above Single-A he was added to the 40-man roster, which means the clock is ticking on Kepler showing he belongs in the majors and the door is open for him to reach Minnesota at some point this season if he plays well.

14. Michael Cederoth | Starter | DOB: 11/92 | Throws: Right | Draft: 2014-3

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2014     RK+    11     10     3.55      45.2      41      1      42     18

In their ongoing effort to add more high-end velocity to the organization the Twins picked San Diego State right-hander Michael Cederoth in the third round last year. Cederoth was a starter in 2012 and 2013, but shifted to the bullpen in 2014 and topped out at 100 miles per hour while racking up 20 saves with a 2.28 ERA and 55 strikeouts in 52 innings. Despite that relief success Cederoth made his pro debut as a starter and fared pretty well for rookie-level Elizabethton.

Making the abbreviated outings that are common for rookie-ball starters, he posted a 3.55 ERA with just one homer allowed and a 42/18 K/BB ratio in 46 innings. His fastball predictably wasn't able to reach triple-digits as a starter, but Cederoth worked in the mid-90s and his control was encouraging. He walked 3.5 per nine innings, which is a lot, but in college Cederoth walked 5.2 per nine innings.

Converting hard-throwing college relievers into pro starters has repeatedly gone poorly for the Twins in recent years and Cederoth's mediocre results as a college starter leave even less room for optimism, but he's 6-foot-6 with an equally big fastball and there's always a role in the majors for that profile even if it's yet to be determined. This year he'll make the jump up to full-season competition at Single-A and try to develop his secondary pitches.

13. Amaurys Minier | Left Field | DOB: 1/96 | Bats: Switch | Sign: Dominican

YEAR     LV      PA      AVG      OBP      SLG     HR    XBH     BB     SO
2013     RK-    119     .214     .252     .455      6     13      6     29
2014     RK-    205     .292     .405     .520      8     21     29     52

When the Twins signed Amaurys Minier for $1.4 million as a 16-year-old out of the Dominican Republic there were immediate comparisons to Miguel Sano, but those quieted down when he hit .214 at rookie-ball in his pro debut. However, within the ugly batting average Minier showed a ton of power and last season he made it clear why the Twins were so high on him by crushing the Gulf Coast League in his second go-around.

Minier hit .292/.405/.520 with eight homers, 21 total extra-base hits, and 29 walks in 53 games, leading the GCL in homers and ranking third in both slugging percentage and OPS. And he did so while playing the entire season at age 18. He was signed as a shortstop, debuted at third base, and played left field and first base last season, but his eventual defensive home is secondary to Minier's offensive upside as a switch-hitting slugger.

Rookie-ball numbers should be viewed skeptically because the level of competition is inconsistent and the sample size is small, but Minier's production was special. He posted a .925 OPS, which is the highest by any Twins prospect in the Gulf Coast League during the past decade. And the only Twins prospects in the Gulf Coast League within 30 points of his OPS from 2005-2014 were Chris Parmelee (.901 in 2006), Aaron Hicks (.900 in 2008), and Kennys Vargas (.895 in 2010).

12. Stephen Gonsalves | Starter | DOB: 7/94 | Throws: Left | Draft: 2013-4

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2013     RK-     5      2     0.63      14.1       8      0      18      7
         RK+     3      3     1.29      14.0      10      0      21      4
2014     RK+     6      6     2.79      29.0      23      1      26     10
         A-      8      8     3.19      36.2      31      1      44     11

Stephen Gonsalves was viewed as a first-round talent in 2013, but fell to the Twins in the fourth round following a suspension during his senior year of high school in California and then signed for second-round money at $700,000. His pro debut was impressive, as the 6-foot-5 lefty logged 28 rookie-ball innings with a 0.95 ERA and 39/11 K/BB ratio without allowing a homer. He stayed in rookie-ball to begin last season and then moved up to low Single-A, where he thrived at age 19.

Despite being younger than around 90 percent of the pitchers in the Midwest League he started eight games for Cedar Rapids with a 3.19 ERA and 44/11 K/BB ratio in 37 innings, striking out 30 percent of the batters he faced while opponents hit .228 with one homer. Toss in his rookie-ball numbers and through two pro seasons Gonsalves has a combined 2.39 ERA with 109 strikeouts and two homers allowed in 94 innings.

His control still needs work and Gonsalves' off-speed pitches generally receive mediocre reviews, both of which may need to change for his success to continue against tougher competition if his fastball stays in the low-90s. He also needs to handle a full-season workload for the first time at age 20, so expectations should be held in check, but Gonsalves looks like a potential mid-rotation starter down the road if things go well.

11. Trevor May | Starter | DOB: 9/89 | Throws: Right | Trade: Phillies

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2012     AA     28     28     4.87     149.2     139     22     151     78
2013     AA     27     27     4.51     151.2     149     14     159     67
2014     AAA    18     18     2.84      98.1      75      4      94     39
         MLB    10      9     7.88      45.2      59      7      44     22

When the Twins acquired Trevor May from the Phillies along with Vance Worley in exchange for Ben Revere he was coming off an underwhelming 2012 season at Double-A. They had him repeat the level in 2013 with similarly mediocre results, but May moved up to Triple-A last year and took a big step forward. He posted a 2.84 ERA with 94 strikeouts in 98 innings, cut his walk rate by 15 percent, and allowed just four homers after previously struggling to limit long balls.

That earned May an August call-up to the majors, where everything unraveled. His debut was a mess, as he issued seven walks in two innings and 10 of 15 batters reached base. He continued to struggle for the next few starts and finished with a hideous 7.88 ERA, but May actually showed signs of progress down the stretch. He posted a strong 41/9 K/BB ratio in his final 37 innings, averaged 92 miles per hour with his fastball, and generated a solid number of swinging strikes.

There's no doubt that it was a sour first taste of the majors, but May at least showed glimpses of his potential to match the 18 good starts at Triple-A. He'll likely be a part of the Twins' rotation at some point in 2015 and if May can throw strikes he's capable of being a mid-rotation starter. At age 25 and with 400 innings between Double-A and Triple-A his leash may not be particularly long considering the Twins were so hesitant to promote him in the first place.


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February 16, 2015

Top 40 Twins Prospects of 2015: 20, 19, 18, 17, 16

Also in this series: 1-5, 6-10, 11-15, 21-25, 26-30, 31-35, 36-40.

20. Lewin Diaz | First Base | DOB: 9/96 | Bats: Left | Sign: Dominican

YEAR     LV      PA      AVG      OBP      SLG     HR    XBH     BB     SO
2014     DSL    174     .257     .385     .451      5     18     26     24

Lewin Diaz was the Twins' biggest ticket item from 2013 international spending, signing for $1.4 million out of the Dominican Republic as a 16-year-old. Baseball America referred to the 6-foot-4 first baseman's "big, lumbering body" and wrote that "his value is all in his bat." That player type normally doesn't interest the Twins, but Diaz made his pro debut last season in the Dominican Summer League and batted .257/.385/.451 with 18 extra-base hits and 26 walks in 43 games.

Rookie-ball numbers are to be taken with large grains of salt and the Dominican Summer League is even a step down from that in terms of competition, so Diaz's actual numbers there don't mean much. However, the fact that he hit a bunch of homers and doubles while walking more than he struck out is certainly a positive first impression by a 17-year-old. He was signed for his bat and so far his bat looks pretty good.

For some context his Isolated Power was 125 percent higher than the Dominican Summer League average and he drew 45 percent more walks than the DSL as a whole. When your body type is compared to guys like David Ortiz and Ryan Howard at age 16 you obviously need to hit a ton to make it to the big leagues, which Diaz will look to continue doing at rookie-ball in his American debut this year.

19. Chih-Wei Hu | Starter | DOB: 12/93 | Throws: Right | Sign: Taiwan

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2013     RK-    12      5     2.45      36.2      28      0      39      8
2014     RK+     3      3     1.69      16.0       7      0      16      2
         A-     10      9     2.29      55.0      40      0      48     13

Signed out of Taiwan for $220,000 in late 2012 as an 18-year-old, Chih-Wei Hu had a strong debut in the rookie-level Gulf Coast League in 2013 with a 2.45 ERA and 39/8 K/BB ratio in 37 innings. He began last season one level higher at rookie-level Elizabethton, but after just three impressive starts there the Twins decided to promote him to low Single-A. Hu didn't miss a beat, holding Midwest League hitters to a .201 batting average and zero homers in 55 innings.

Hu draws the most praise for his mature approach, strike-throwing ability, and quality changeup, but the 6-foot-1 right-hander is hardly a soft-tosser and can reach the mid-90s with his fastball at times. He has a 103/23 K/BB ratio in 108 career innings through age 20 and has yet to allow a home run in 420 plate appearances despite facing older competition in the vast majority of those matchups.

It's important to keep expectations in check for low-minors pitchers and Hu still needs to show that he can handle a full-season workload as a starter, but he's someone to keep an eye on this season and could rank much higher on this list next year. He was highly thought of as a prospect before signing, has fared very well against older competition at three different levels, and backs up the numbers with quality raw stuff.

18. Taylor Rogers | Starter | DOB: 12/90 | Throws: Left | Draft: 2012-11

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2012     RK+     6      6     1.80      30.0      20      2      39      5
         A-      9      4     2.70      33.1      33      5      35     12
2013     A-      3      3     7.20      10.0      14      1      10      4
         A+     22     21     2.55     130.2     119      5      83     32
2014     AA     24     24     3.29     145.0     150      4     113     37

Taylor Rogers went 13-18 with a 5.35 ERA in three seasons at the University of Kentucky, but the Twins picked him in the 11th round of the 2012 draft and now he's 26-16 with a 2.94 ERA in three seasons as a pro. His success has come despite mediocre strikeout rates, but that inability to miss bats against Single-A and Double-A hitters--and the lack of upside that suggests--is what keeps him from being considered a top prospect.

Last year at Double-A he posted a 3.29 ERA in 24 starts, but managed just 113 strikeouts in 145 innings for a rate below the Eastern League average. It wasn't all smoke and mirrors, though. Rogers had a good walk rate, allowed just four homers in 606 plate appearances, and induced lots of ground balls. And while he was much more effective against lefties than righties, the 6-foot-3 southpaw still held righties to a .367 slugging percentage with a 73/29 K/BB ratio.

Rogers was relatively young for Double-A at age 23 and his velocity has improved to the point that he regularly works in the low-90s, so he's certainly not without potential. Right now he projects as a back-of-the-rotation starter, but an uptick in strikeouts or improved control to go along with the strong ground-ball rates would give him mid-rotation upside. Either way, he's a candidate to reach the majors in 2015 and the Twins' decision-makers generally speak highly of him.

17. Adam Walker | Right Field | DOB: 10/91 | Bats: Right | Draft: 2012-3

YEAR     LV      PA      AVG      OBP      SLG     HR    XBH     BB     SO
2012     RK+    252     .250     .310     .496     14     25     19     76
2013     A-     553     .278     .319     .526     27     65     31    115
2014     A+     555     .246     .307     .436     25     45     44    156

Adam Walker's power potential is undeniable. He put up big college numbers at Jacksonville to get picked by the Twins in the third round of the 2012 draft, went deep 14 times in his 58-game debut at rookie-ball, and led his league in homers during each of his first two full seasons. Last year his 25 homers for Fort Myers led the Florida State League and no one else managed even 20 long balls. Walker can hit the ball over the fence.

Unfortunately his inability to control the strike zone stands out almost as much. He's struck out a lot and rarely walked dating back to college and as a pro he's whiffed 347 times in 319 games. That's a red flag, especially when he's already 23 years old and has yet to face competition above Single-A. Walker showed a bit more selectivity last year with 44 walks in 555 plate appearances, but that came with 156 strikeouts and led to a lowly .246 average and .307 on-base percentage.

Most high-strikeout sluggers in the majors didn't actually strike out a ton in the minors because striking out a ton in the minors usually leads to failing in the majors. Walker needs to cut down on his strikeouts or at least learn to draw walks at a much higher rate or his 30-homer power will be wasted. He's a good athlete with above-average speed for a corner outfielder and should be a plus defensively, so if the strike-zone control clicks at some point he has plenty of all-around upside.

16. Michael Tonkin | Reliever | DOB: 11/89 | Throws: Right | Draft: 2008-30

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2012     A-     22      0     1.38      39.0      29      1      53      9
         A+     22      0     2.97      30.1      24      2      44     11
2013     AA     22      0     2.22      24.1      21      0      30      8
         AAA    30      0     4.41      32.2      33      3      36      8
         MLB     9      0     0.79      11.1       9      0      10      3
2014     AAA    39      0     2.80      45.0      41      2      46     12
         MLB    25      0     4.74      19.0      23      2      16      6

After beginning his pro career as a 30th-round draft pick and mediocre starter prospect Michael Tonkin shifted to the bullpen full time in 2011 and has looked like a late-inning reliever prospect ever since. He's split each of the past two years between Rochester and Minnesota, posting a 3.48 ERA with 82 strikeouts in 78 innings at Triple-A and a 3.26 ERA with 26 strikeouts in 30 innings in the majors. At age 25 he's deserving of extended chance in the Twins' bullpen for 2015.

Tonkin is a sturdy 6-foot-7 with the velocity to match his size, averaging 94 miles per hour with his fastball in the majors. He also throws a sharp, mid-80s slider that has already proven to be a plus pitch against big-league hitters by generating swinging strikes and ground balls. He's allowed a total of just 13 homers in 278 innings between the minors and majors over the past four years, including no more than four homers in a season.

Tonkin has top-notch raw stuff, misses plenty of bats with his fastball-slider combo, and unlike lots of hard-throwing reliever prospects he actually throws strikes too. His career walk rate is a very reasonable 2.5 per nine innings, including 2.3 at Triple-A and 2.7 in the majors. By this time next year there's a decent chance Tonkin will be entrenched as Glen Perkins' primary setup man and will have his own identity rather than being known as Jason Kubel's brother-in-law.


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