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• Aaron Hicks got off to such a dreadful start that his overall numbers are going to look ugly for a long time--and maybe even the entire season--but there's no doubt he's putting together better plate appearances and getting better results. That all culminated with Monday's two-homer game and Hicks is now hitting .215/.333/.431 with three homers and a 15-to-12 strikeout-to-walk ratio in his last 22 games. Before that he was 2-for-43 (.047) with 20 strikeouts and three walks.

Since mid-April or so Hicks has been exactly the type of hitter that his minor-league track record suggested he would be, offsetting a low batting average with lots of walks and some power. Much has been made of Oswaldo Arcia's impressive start, and rightfully so, but since being recalled from Triple-A on April 20 he has an .839 OPS and Hicks has a .764 OPS. There are two rookies playing well offensively in the Twins' outfield right now.

Defensively has been another issue, however. Hicks was billed as a very good center fielder and has shown flashes of that, including robbing Adam Dunn of a homer along with hitting two of his own Monday, but overall he's been shaky with lots of bad reads and delayed reactions. Arcia was billed as a very good right fielder and actually played center field 77 times in the minors, which is almost impossible to believe while watching him stumble around struggling to make routine plays.

• Arcia's arrival initially cut into Ryan Doumit's playing time, but now that Doumit has broken out of his early slump Chris Parmelee is the one finding himself on the bench most often. Doumit or Parmelee is an interesting dilemma. Doumit is a switch-hitter, but since he's typically unproductive from the right side they might as well both be left-handed hitters. Doumit has a far superior track record and is signed through next season, but he's also 32 years old and Parmelee is 25.

In theory a team focused on 2013 should play Doumit and a team focused on the future should play Parmelee, but Doumit being signed for 2014 changes that a bit and the jury is very much still out on whether Parmelee is part of the future anyway. Parmelee had a great September debut in 2011 and crushed Triple-A pitching for two months last season, but he's hit .223/.292/.364 with eight homers and an 81-to-24 strikeout-to-walk ratio in 96 games for the Twins since 2012.

• In terms of age and lackluster performance Brian Dozier is similar to Parmelee, but the major difference is that the Twins don't have Arcia-caliber alternatives in the infield. I've been impressed by Dozier's defense at second base, but today is his 26th birthday and he's hit .230/.267/.324 with an 85-to-23 strikeout-to-walk ratio in 113 career games. He also hit just .232/.286/.337 in 48 games at Triple-A, so it's been a while since Dozier showed any sort of promise.

At the very least Dozier and his .267 career on-base percentage have no business in the leadoff spot, where the Twins have gotten a grotesque .189/.229/.233 line. That helps explain how Joe Mauer has just 13 RBIs despite batting .340 with 17 extra-base hits in 35 games. Jamey Carroll replacing Dozier at second base would likely improve the leadoff spot, but it's sort of a Parmelee-or-Doumit situation because Carroll is 39.

• Mauer has hit .319 with men on base, including .381 with runners in scoring position, but he's had a grand total of just 76 runners on base in his 157 plate appearances. By comparison Justin Morneau has had 126 runners on base in 149 plate appearances because he's got Mauer (.426 OBP) and Josh Willingham (.377 OBP) back-to-back in front of him. And batting Mauer second isn't really the issue, because in the third spot he'd just have two awful OBPs in front of him.

Mauer hit .366 in his first 17 games, then went into a career-worst 0-for-21 slump, and has now hit .431 with 10 doubles and 11 walks in 13 games since snapping his hitless streak. That works out to a .532 OBP and .628 slugging percentage. On this week's "Gleeman and The Geek" episode we talked about how odd it is for Mauer to be striking out so much, but his overall production is solidly above his career norms and he's also playing much better than last year defensively.

• Saturday night Vance Worley allowed five runs on 11 hits in 5.1 innings against the Orioles and got the win (Mauer, Morneau, and the Twins' lineup really got the win, but old stats die hard). In doing so Worley became just the seventh Twins pitcher in the Ron Gardenhire era (2002-2013) to win a game in which he allowed 11 or more hits:

Vance Worley      5/11/2013     Orioles
Nick Blackburn     5/4/2010     Tigers
Carlos Silva       5/9/2006     Rangers
Carlos Silva      4/29/2005     Angels
Carlos Silva       8/3/2004     Angels
Kyle Lohse         9/2/2003     Angels
Brad Radke        8/24/2002     Royals

Carlos Silva had 47 wins for the Twins and three of them came while allowing 11 or more hits, including a complete-game shutout in 2004. In all there have been 89 wins assigned to pitchers who allowed 11 or more hits in Twins history and Roger Erickson on June 25, 1978 is the only one to get fewer outs than Worley.

• On a related note, Twins pitchers have the fewest strikeouts in baseball with 204. No other team has fewer than 232 strikeouts and 14 teams have more than 300 strikeouts, including the Tigers with an MLB-leading 378. Breaking it down even further, Twins starters have 4.3 strikeouts per nine innings and Twins relievers have 8.0 strikeouts per nine innings, so the bullpen has actually been missing plenty of bats.

• Glen Perkins and Jared Burton since the beginning of 2012:

                 IP      ERA     SO     BB     HR     OAVG
Glen Perkins     83     2.71     98     21      9     .216
Jared Burton     79     2.05     74     22      5     .190

I wish Gardenhire would use Perkins a little more in non-save situations, but knowing that duo is looming whenever the Twins have a lead after seven innings is pretty fun.

• With a .500 record through 36 games the Twins have dramatically out-performed expectations so far. Here's how 18-18 compares to their previous records through 36 games under Gardenhire:

2013   18-18
2012   10-26
2011   12-24
2010   22-14
2009   18-18
2008   19-17
2007   17-19
2006   17-19
2005   21-15
2004   22-14
2003   20-16
2002   22-14

During their run of six AL Central titles from 2002-2010 the Twins' average record after 36 games was 20-16 when they made the playoffs and 19-17 when they didn't. Either way, it sure beats the hell out of where they stood after 36 games in 2011 and 2012.

• Last night was the 34th time in 36 games that the Twins have been the gambling underdogs. If you'd have bet $100 on the Twins to win each game so far you'd be up $618, which is on pace for a $2,781 profit over the course of 162 games.

• Jim Callis' first mock draft for Baseball America has the Twins taking Texas high school pitcher Kohl Stewart with the No. 4 pick. Callis also writes: "Rumors persist that Minnesota could cut a deal with Washington high school catcher Reese McGuire and spend heavily further down in the draft." Baseball America's current top-100 rankings have Stewart at No. 6 and McGuire at No. 12.

• Baltimore wants Alexi Casilla to give up switch-hitting even though his career numbers don't suggest it makes any sense.

• I love this picture of Hicks robbing Dunn of a homer.

• John Bonnes was on vacation, so Parker Hageman stepped in as my co-host for this week's "Gleeman and The Geek" episode and we got super-nerdy with the hardcore Twins talk.

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Signed to a two-year, $6.5 million contract last offseason to provide some much-needed middle infield stability, Jamey Carroll was more or less as advertised at age 38. He played sure-handed defense with decent range, worked deep counts and drew walks without striking out much, and moved all around the infield while starting 56 times at second base, 33 times at shortstop, and 28 times at third base.

Carroll got off to a slow start thanks largely to a low batting average on balls in play, but his luck evened out in the second half as he hit .315/.378/.371 in 58 games. Overall he batted .268 after hitting .285 during the previous four seasons, but thanks to 52 walks in 537 plate appearances Carroll still managed a .343 on-base percentage that topped Denard Span and Justin Morneau to rank third on the team behind Joe Mauer and Josh Willingham.

He joined Mauer and Willingham as three of the 22 hitters in the American League to see more than 4.0 pitches per plate appearance and joined Span and Ben Revere as three of the league's seven hitters to make contact on more than 90 percent of their swings. Carroll's ability to grind out long plate appearances and draw walks is particularly impressive considering his power was non-existent and pitchers threw him the third-most strikes in the league.

Carroll's complete lack of power was to be expected, as his lone homer of the season came on September 2 and snapped a streak of 1,540 plate appearances without a homer dating back to 2009. His modest RBI total of 40 actually set a new career-high and matched his combined RBI total in 924 plate appearances during the previous two seasons. His offensive value comes from getting on base and he did that remarkably well for a 38-year-old.

Defensively he began the year as the starting shortstop and looked perfectly capable there, but shifted to second base in May. That move was seemingly driven less by anything Carroll did and more by the Twins believing (wrongly, it turns out) that Brian Dozier was ready to thrive. Dozier was so unimpressive defensively that the Twins have apparently soured on him as a shortstop and he posted a .271 on-base percentage that was barely higher than Carroll's batting average.

Carroll is under contract for $3.75 million in 2013 and if the Twins decide against acquiring more infield help he figures to battle Dozier for the second base job during spring training. If he wins that battle or perhaps beats out Pedro Florimon for the shortstop job it'll be interesting to see how the Twins handle Carroll's playing time. Not only do 39-year-olds need regular days off, Carroll topping 401 plate appearances would trigger a $2 million player option for 2014.

In the history of baseball only 13 middle infielders have topped 400 plate appearances at age 39, but then again Carroll just became one of only 19 middle infielders to top 500 plate appearances at age 38. All of which means he's already aged significantly better than nearly every player like him for the past 100 years, but no one should be surprised if Carroll declines suddenly at some point. Until then he'll be a solid role player who can plug whichever infield hole is leaking most.

Other "offseason outlook" write-ups: Justin Morneau, Josh Willingham, Trevor Plouffe, Joe Mauer, Ryan Doumit, Brian Duensing

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• As of September 1 rosters can expand from 25 to as many as 40 players, but the Twins waited until September 4 to do so and then called up just two players: Eduardo Escobar and Luis Perdomo. Escobar is a light-hitting 23-year-old middle infielder who was acquired from the White Sox in the Francisco Liriano trade and hit just .217/.259/.304 with a 26-to-8 strikeout-to-walk ratio in 35 games at Triple-A following the deal.

Perdomo is a 28-year-old journeyman reliever who was signed as a minor-league free agent back in November and began this season at Double-A before moving up to Triple-A. Between the two levels he threw 73 innings with a 2.60 ERA and 68-to-22 strikeout-to-walk ratio, and Perdomo also got a five-game stint with the Twins earlier this season in which he walked seven in six innings. He throws hard, but has iffy control and a 4.07 career ERA at Triple-A.

• Apparently those are the only planned additions for the entire month, which means players on the 40-man roster not getting call-ups include Brian Dozier, Deolis Guerra, Jeff Manship, Pedro Hernandez, and Oswaldo Arcia. Dozier's lack of a call-up is the most surprising, because when the Twins demoted him to Triple-A last month the assumption was that he'd definitely be back once rosters expanded.

Instead he was a mess in Rochester, hitting just .171 with a 16/3 K/BB ratio in 20 games to continue the troubling lack of strike-zone control he showed in the majors. Combined between Triple-A and the majors Dozier hit .233 with a .276 on-base percentage and .334 slugging percentage while striking out 92 times compared to 30 walks. Plenty of prospects bounce back from a terrible season, but the difference with Dozier is that he's already 25 years old.

• And then there's Anthony Slama, who as usual posted amazing numbers at Triple-A and as usual is ignored by the Twins. Slama finished his fourth consecutive season in Rochester with a 1.24 ERA, .195 opponents' average, and 56 strikeouts in 36 innings, giving him a lifetime 2.27 ERA and 191 strikeouts in 154 innings at Triple-A. Slama is 28 years old, so whatever career he was capable of having has been wasted because the Twins wouldn't give him a chance.

For his minor-league career Slama has a 1.99 ERA and 12.4 strikeouts per nine innings, racking up more than twice as many strikeouts (446) as hits allowed (213) in 325 innings. Maybe he would have struggled against big-league hitters, but the Twins will never know because they repeatedly left Slama in the minors to rot. This year that involved giving Jeff Gray five months and 50 innings to show that his lengthy track record of mediocrity wasn't a fluke.

• Denard Span was finally placed on the disabled list after staying on the Twins' active roster for 18 days with a shoulder injury that allowed him to play just four games during that time. Rather than another rant about the Twins' medical staff I'll focus on the fact that Span's injury opens the door for Chris Parmelee to get an extended opportunity down the stretch after mostly sitting on the bench for a month last time he was in the majors.

Parmelee certainly deserves a chance after hitting .338/.457/.645 with 17 homers, 17 doubles, and a 52-to-51 strikeout-to-walk ratio in 64 games at Triple-A, but as I wrote three weeks ago without a trade or an injury there wasn't anywhere for him to play. It's interesting that the Twins are using Parmelee in right field because he figures to be below average there and played zero innings in the outfield for Rochester.

• This year's Arizona Fall League participants are out and the Twins are sending Kyle Gibson, Michael Tonkin, Logan Darnell, Caleb Thielbar, Chris Herrmann, Nate Roberts, and Evan Bigley. Going to the AFL is a way for Gibson to get some work in after missing most of the season following last year's Tommy John surgery and a strong performance there could give him at least some chance to compete for a spot in the Twins' rotation next spring.

Gibson, Herrmann, and Roberts each cracked my list of the Twins' top 40 prospects heading into the season and Tonkin will definitely be on the 2013 list after breaking out between two levels of Single-A. This will be Herrmann's second trip to the AFL, as he was part of the Twins' contingent there last year along with Dozier, Aaron Hicks, Cole DeVries, Scott Diamond, Dakota Watts, Brett Jacobson, and Bruce Pugh.

• Lester Oliveros pitched well enough in the minors this season to emerge as a bullpen option for 2013, but now the hard-throwing right-hander will likely miss all of next year after Tommy John elbow surgery. Acquired from the Tigers in last season's Delmon Young trade, Oliveros threw 48 innings with a 2.42 ERA and 51-to-15 strikeout-to-walk ratio between Double-A and Triple-A at age 24 and has (or at least had) a legitimate mid-90s fastball.

• As the Twins appear headed for another top-five draft pick it's worth noting that the 2013 draft class, much like the 2012 draft class, is viewed as lacking elite-level talent. Keith Law's early ESPN rankings include Mark Appel in the top spot after the Stanford right-hander fell to No. 8 and turned down $3.8 million to go back to school, followed by Arkansas right-hander Ryne Stanek, Stanford outfielder Austin Wilson, and Indiana State left-hander Sean Manaea.

• After bludgeoning the White Sox for 18 runs Tuesday night the Twins rank fourth among all MLB teams in games with double-digit runs scored this season, yet they rank just 13th in overall runs per game. When the Twins score double-digit runs they're 13-0. In all other games they're 43-81 while averaging 3.6 runs per game.

• Jamey Carroll snapped the majors' longest homerless streak Monday, going deep off White Sox starter Hector Santiago for his first home run in 1,540 plate appearances dating back to August 9, 2009. In between Carroll long balls Jose Bautista led the majors with 134 homers, seven players homered at least 100 times, and 93 players homered at least 50 times.

• Parker Hageman of Twins Daily used video and numbers to examine Joe Mauer's struggles throwing out runners this season.

• Ben Revere is now hitting .300 with a .690 OPS, which would make him the first player since Lenny Randle in 1974 to hit .300 or higher with an OPS below .700. Aside from Revere and Randle no other .300 hitter has posted a sub-.700 OPS since 1943.

• In the comments section of my post last week about Darin Mastroianni's future several people wondered if he could be an option at second base after seeing some time there in the minors, but Ron Gardenhire has already shot that idea down pretty thoroughly.

• For a lot more about September call-ups, Dozier, Slama, and the Twins' medical staff check out this week's episode of Gleeman and The Geek (which is back to being fueled by beer).

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With the league's second-worst record at 36-49 and an 11-game deficit in the AL Central at the All-Star break the Twins have made it clear that they should be sellers leading up to the July 31 trade deadline. Determining which players they should be willing to sell and how much they should expect to get in return is a more complicated question, so yesterday I broke down the pros and cons of pitchers potentially being shopped and today I'll do the same for hitters.

Denard Span, 28-year-old center fielder

Why trade him? He's a 28-year-old center fielder with solid defense, good on-base skills, and a reasonable contract that has him under team control through 2015. Ideally that would make him a building block, but it also potentially makes him the Twins' most valuable trade piece and if the reports about the Nationals' interest in Span last year at this time are any indication he's one of the organization's few veteran assets who would bring back a hefty return.

If it takes the Twins another two seasons to build a legitimate contender Span would be 31 years old at that point, with just one season and $9.5 million remaining on his contract, so the idea of building around him is somewhat flawed. Toss in Ben Revere's presence as an obvious center field replacement and there's certainly a strong argument to be made for Span having more value as a means to further the rebuilding effort than as part of the rebuilding effort.

Why not trade him? Just because Span might be over 30, expensive, and close to free agency by the time the Twins put a consistent winner on the field doesn't mean they're forced to trade him now. It's possible his market will be even stronger this offseason or leading up to next year's trade deadline. And while Revere has played well there are still questions about him as an everyday center fielder and leadoff man. If they trade Span they need to get great value.

Josh Willingham, 33-year-old left fielder

Why trade him? It seems odd that teams would be willing to give up significant value to trade for Willingham now when they could have simply out-bid the Twins to sign him as reasonably priced free agent this offseason, but that appears to be the case. Willingham is 33 years old, has yet to spend any time on the disabled list after a career filled with minor injuries, and is hitting better than ever, so his perceived value may very well be at an all-time high.

His value to the Twins shouldn't be overlooked since his deal runs through 2014, but as much as I loved the signing at the time it would be a nifty trick to bring in a 33-year-old free agent without forfeiting a draft pick, pay him a modest salary for a great half-season, and then flip him for a quality prospect or two. It's not crazy to imagine the prospects and $14 million saved having more value to a rebuilding team than Willingham's age-34 and age-35 seasons.

Why not trade him? From a "players are also people" standpoint trading him six months into a three-year deal would probably ruffle some feathers and potentially cause future free agents to think twice about coming to Minnesota. And while Willingham is old, injury prone, and unlikely to maintain his current level of production he's been a damn good hitter for entire career, fits Target Field perfectly, and should maintain substantial trade value past July 31.

Justin Morneau, 31-year-old first baseman

Why trade him? Aside from a short disabled list stint due to soreness in his surgically repaired wrist Morneau has been mostly healthy and his lack of concussion-related issues is especially encouraging, but he's been a shell of his former. Dating back to the concussion on July 7, 2010 he's hit .236/.298/.386 with 15 homers in 134 games, although he's at least shown signs of life this season with some hot streaks and vintage production versus righties.

Morneau has hit .313/.389/.571 off righties, but his overall numbers are below average for a first baseman thanks to a putrid .124/.160/.202 mark and 27-to-4 strikeout-to-walk ratio off lefties. Contenders in need of left-handed thump may still be interested in gambling on a former MVP and with 2013 being the final season of his six-year, $80 million contract the Twins will likely have moved on from Morneau in 2014 whether he's traded or leaves as a free agent.

Why not trade him? Even if teams are willing to take on the $14 million Morneau is owed next season it's unlikely they'd be desperate enough to do that and give up a decent prospect for a 31-year-old first baseman hitting .246/.312/.440 after missing most of the past two seasons with serious injuries. Simply unloading his salary would have value, but if the Twins believe he's still capable of big-time pop then moving him at next year's deadline is more appealing.

Jamey Carroll, 38-year-old second baseman

Why trade him? Carroll's defensive versatility, solid glove, and excellent on-base skills have been as advertised at age 38, but unfortunately so has his lack of power and he's hitting just .234 after four straight seasons above .275. Some of that can be blamed on a .272 batting average on balls in play that's 50 points below his career norm and with a little better luck he's still a very passable stop-gap starter at second base, third base, or even shortstop.

There isn't really a strong need for that on a rebuilding team even if his continued presence won't be a bad thing, but contenders looking to plug an infield hole cheaply could give Carroll a look and he'd fit on plenty of teams as a utility man. Whether teams view him as a starter or a utility man obviously the Twins aren't going to get much for a 38-year-old hitting .234/.318/.278, but clearing his $3.75 million salary from next season's books would have some value.

Why not trade him? It'd be one thing to dump Carroll if his departure cleared room for a top middle prospect ready for an extended opportunity, but as usual the Twins are short on those. Brian Dozier's arrival in the majors already pushed Carroll from shortstop to second base two months ago, 2011 first-round pick Levi Michael is struggling at high Single-A, and the rest of the middle infield cupboard is bare. Dumping him just to dump him wouldn't accomplish much.

Danny Valencia, 27-year-old third baseman

Why trade him? Valencia earned his mid-May demotion to Triple-A by playing horribly on both sides of the ball and has since been equally terrible in Rochester, hitting .244/.281/.404 with a 34-to-11 strikeout-to-walk ratio in 55 games. That alone is more than enough to push him out of the Twins' plans and whatever slim chance he had of reclaiming the starting job at third base has vanished with each Trevor Plouffe homer.

He's not as awful as he looked this season, but as a 27-year-old career .263/.303/.391 hitter in the majors and .275/.310/.418 hitter at Triple-A there's little to suggest Valencia has any kind of offensive upside worth waiting for and he's never been much of a defender. It would be delusional to think the Twins could get more than a marginal prospect in return for Valencia, but if a team thinks he'd benefit from a change of scenery they should pull the trigger.

Why not trade him? If you set aside the back story and failure to meet inflated expectations to simply focus on Valencia's skill set he'd have some value as a part-time player. Valencia has flailed away against right-handers, but he's a career .325/.374/.485 hitter versus left-handers and won't top a minimum salary until at least 2015. That makes him useful enough as a cheap platoon player and backup third baseman/first baseman to keep around if there's zero market.

Alexi Casilla, 27-year-old second baseman

Why trade him? Much like Luis Rivas before him Casilla has gone from young and supposedly promising to 27 years old and simply not very good, all while the Twins waited and waited for an upside based more on faith than evidence. They've invested six seasons and more than 1,600 plate appearances into the notion that Casilla is capable of being a quality everyday second baseman, but he's a career .250/.306/.333 hitter who's shown zero signs of improving.

This year he went from Opening Day second baseman to little-used utility man despite being paid $1.4 million and it's tough to imagine the Twins retaining Casilla for a third and final year of arbitration at a similar price. It's possible, however, that another team still believes in his speed and athleticism, so if he's not playing now and he's not in the Twins' plans for 2013 and beyond trading Casilla for even a marginal prospect would beat non-tendering him this winter.

Why not trade him? It's also possible every other team has given up on Casilla being more than a decent backup too, in which case he won't fetch anything via trade and the question is whether he's worth keeping around for 2013. I'd say no, in part since iffy defensive shortstops make poor utility men and in part because enough is enough, but if the Twins still aren't ready for a clean breakup at least $1.5 million or so wouldn't put much of a dent in the payroll.

Minutes after the final out of last night's loss the Twins shook up the roster for the second time this week, demoting Danny Valencia to Triple-A and designating Matt Maloney for assignment while calling up utility man Darin Mastroianni and right-hander P.J. Walters from Rochester. They also announced that Francisco Liriano has been shifted to the bullpen, with Walters taking his spot in the starting rotation beginning Saturday against the Blue Jays.

Less than 48 hours earlier Ron Gardenhire insisted that the Twins would stick with Liriano as a starter, but now they're apparently hoping to get him back on track for an eventual return to the rotation with some low-leverage relief work. Liriano has taken some very small steps forward in his last two starts, but has been mostly terrible since the beginning of last season and it would be worth seeing what he can do in a one-inning role before free agency beckons.

Unfortunately his rotation replacement is a 27-year-old soft-tosser, so while watching Walters get knocked around may not be quite as frustrating as watching Liriano struggle to find the strike zone the end result figures to be largely the same. Walters has a 7.24 ERA with 12 homers allowed in 51 innings as a big leaguer, averaged just 88.0 miles per hour with his fastball during that time, and has a 4.51 ERA in 91 career starts at Triple-A.

As soon as the Twins called up Brian Dozier to start at shortstop and shifted Jamey Carroll into a utility man role it was clear that Valencia and Alexi Casilla were on some very thin ice. Carroll has started each of the past three games at second base, but apparently that was due mostly to Casilla being limited by a shoulder injury and instead Valencia is the one on the chopping block after serving as the starting third baseman since mid-2010.

Valencia was never a top prospect and a modest minor-league track record made it obvious that his strong half-season debut was largely a fluke, but he's declined even further than expected since then both offensively and defensively. He's played 266 games in the majors and hit just .262/.304/.395, which would be poor production from a shortstop or a catcher and is downright awful for a third baseman who's mediocre defensively on a good day.

On the other hand he's 27 years old with more than 1,000 plate appearances in the majors, so a demotion to Triple-A furthering his development seems like wishful thinking. Valencia is what he is at this point, and that's simply not a quality regular because he can't hit right-handed pitching. With that said, he's a career .325/.374/.485 hitter against left-handers and that type of production certainly has a place on a major-league roster if used correctly.

Mastroianni is technically replacing Valencia on the roster, but don't count on him making much of an impact. Claimed off waivers from the Blue Jays in February and assigned to Double-A to begin the season despite being 26 years old, he moved up to Triple-A because of injuries in Rochester and took advantage by hitting .365 in 19 games. That obviously got the Twins' attention, but Mastroianni hit just .279/.358/.389 in 79 games at Triple-A last season.

Mastroianni's lack of power has limited him to a .372 slugging percentage as a minor leaguer and makes him unlikely to be more than a useful bench player, but he has good on-base skills, spectacular speed, and can play all three outfield spots along with some second base. It'll be interesting to see if Mastroianni gets any action as an infielder or if Gardenhire will stick with Carroll, Casilla, and Trevor Plouffe in some combination at second base and third base.

Maloney was claimed off waivers from the Reds in October and there's a good chance he'll clear waivers this time around, in which case the Twins can stash him at Triple-A sans 40-man roster spot. He's the latest in a long line of examples showing the folly of putting any kind of faith in spring training performances, as Maloney was one of the most impressive players in camp and then predictably reverted back to the marginal big leaguer he's always been.

It was easy to see that the first roster shakeup was done to facilitate immediate improvement, as Liam Hendriks simply not being ready to thrive in the majors at age 23 made it reasonable to prefer Scott Diamond in the short term and the Twins have high hopes for Dozier. It's not so easy to see how the second roster shakeup really improves much, save for perhaps the fans' viewing experience and Gardenhire's mental state.

For as awful as Valencia has been, giving his starts to Casilla or Plouffe or Mastroianni isn't likely to be much of an upgrade and if nothing else he provided a right-handed bat capable of knocking around left-handed pitching. Liriano has been bad enough for long enough that trying to salvage some value out of him with a move to the bullpen is perfectly reasonable, but replacing him with Walters isn't likely to actually keep more runs off the board.

Of course, making changes mostly for changes sake may not be such a terrible thing at this point considering the Twins are now 73-132 since the final 10 games of the 2010 regular season. It'd be nice if they had better options to call up than Mastroianni and Walters, but they've already rushed non-elite prospects like Hendriks, Chris Parmelee, and Ben Revere to the majors with poor results and the rest of the upper-minors cupboard is mostly bare.

Beyond that, Liriano is at a career crossroads five months from free agency and Valencia may beat him out the door if the Twins can find a taker willing to trade even a mid-level prospect for him. Casilla is next in line for the guillotine if they go into full-on housecleaning mode and unlike last season hopefully they'll commit to a rebuilding effort by ditching more dead weight and getting whatever they can for any veterans not in the plans for 2013 and beyond.

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