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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.