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

30. Matthew Hauser | Reliever | DOB: 3/88 | Throws: Right | Draft: 2010-7

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2010     RK+     8      0     1.00       9.0       7      0      13      2
         A-      4      0     0.00       6.2       5      0       4      1
2011     A-     17      0     1.40      19.1      13      1      27     13
         A+     24      0     2.16      41.2      37      3      44     16

After two seasons at a junior college Matthew Hauser transferred to the University of San Diego and was mediocre as a starter, but then moved to the bullpen as a senior and worked his way into a part-time closer role with a 3.67 ERA and 37-to-9 strikeout-to-walk ratio in 42 innings. That got him taken by the Twins in the seventh round of the 2010 draft and the lack of leverage made him a cheap sign for just $45,000.

Hauser was fantastic in his 16-inning professional debut after signing, allowing one run with a 17-to-3 strikeout-to-walk ratio, and then began last season dominating at low Single-A. He quickly earned a promotion to high Single-A, finished the year at Double-A, and between the three levels he threw 64 innings with a 1.98 ERA and 75-to-29 strikeout-to-walk ratio, holding opponents to a .224 batting average and four homers.

Baseball America's pre-draft scouting report had Hauser typically throwing in the high-80s or low-90s in college, but he's added velocity as a pro and was clocked in the mid-90s at times last season. Those extra miles per hour have resulted in worse control, but he made some strides in that department late in the season and that's a tradeoff Hauser and the Twins will gladly take when he's striking out double-digit batters per nine innings.

29. B.J. Hermsen | Starter | DOB: 12/89 | Throws: Right | Draft: 2008-6

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2009     RK-    10     10     1.35      53.1      32      0      42      4
2010     RK+     8      6     3.32      38.0      39      2      39      4
         A-     12     12     5.00      72.0      85      6      46     15
2011     A-     21     20     3.10     124.2     131     10      81     31
         A+      5      5     4.39      26.2      34      1      20      6

When the Twins picked B.J. Hermsen out of an Iowa high school in the sixth round of the 2008 draft and gave him second-round money in the form of a $650,000 signing bonus he was touted as a power arm, but somewhere along the way he lost the ability to light up radar guns and miss bats. Hermsen stands 6-foot-6, so he certainly looks the part, but his fastball is regularly clocked in the high-80s and he's managed just 228 strikeouts in 315 pro innings.

That includes just 101 strikeouts in 151 innings between low Single-A and high Single-A last season, although the lack of whiffs didn't keep Hermsen from pitching well with a 3.33 ERA in 25 total starts. His success came from throwing strikes and limiting homers, as Hermsen allowed 11 long balls in 645 plate appearances and issued 2.2 walks per nine innings, but opponents also hit .278 off him.

Hermsen is still just 22 years old, so there might be time to rediscover the lost velocity, but it hasn't happened three years into his pro career and unless that changes--or he figures out a way to induce more ground balls to compensate--it's tough to project him as more than a potential mid-rotation starter. This season should provide a good test for whether Hermsen's now-mediocre raw stuff will get the job done against tougher competition.

28. Pat Dean | Starter | DOB: 5/89 | Throws: Left | Draft: 2010-3

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2010     RK-     4      0     0.00       5.0       3      0       5      0
         RK+     5      5     2.59      24.1      17      3      32      1
2011     A-      8      8     2.86      44.0      40      4      37      9
         A+     11     11     6.67      58.0      83      8      36     15

Like so many other college pitchers drafted by the Twins during the past decade Pat Dean got assigned to rookie-ball for his debut and predictably dominated far younger, less experienced hitters before struggling upon climbing the organizational ladder. Dean signed for $320,000 out of Boston College as the Twins' third-round pick in 2010, throwing 29 innings with a 2.15 ERA and ridiculous 37-to-1 strikeout-to-walk ratio between two levels of rookie-ball.

He began last season at low Single-A and continued to pitch well with a 2.86 ERA and 37-to-9 strikeout-to-walk ratio in 44 innings, but then fell apart after a midseason promotion to high Single-A. Dean made 11 starts in Fort Myers, posting a 6.67 ERA while opponents hit .332 with eight homers and his strikeout rate declined to 4.5 per nine innings. He made one late-season start at Double-A, finishing with a 5.00 ERA and 76/25 K/BB ratio in 108 innings overall.

Dean's control has been excellent and he's still young enough to get back on track, but for a 22-year-old with lots of major college experience to be knocked around by high Single-A hitters is definitely a red flag and the fact that his low-90s fastball and assortment of off-speed stuff already struggles to miss bats is especially worrisome. He looked like a potential mid-rotation starter when the Twins drafted him, but at this point that seems pretty optimistic.

27. Deolis Guerra | Reliever | DOB: 4/89 | Throws: Right | Trade: Mets

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2009     A+     16     15     4.69      86.1      95      6      57     25
         AA     12     11     5.17      62.2      62      4      49     17
2010     AA     19     19     6.24     102.1     127     14      67     37
         AAA     5      4     6.84      25.0      35      5      18      8
2011     AA     37     10     5.59      95.0     102     11      95     28

Four years after the Johan Santana trade Deolis Guerra is the lone player acquired from the Mets still in the Twins organization, and unfortunately he's gone from teenage phenom and consensus top-100 prospect to 23-year-old failed starter. Guerra was unnecessarily rushed by the Mets before the trade, which all but forced the Twins to do the same, and his lack of development combined with diminished velocity adds up to a 4.95 career ERA in the minors.

That includes a 5.59 ERA at Double-A last season after posting a 6.36 ERA between Double-A and Triple-A in 2010, but hidden by those ugly overall numbers is that Guerra thrived upon moving to the bullpen around midseason. As a reliever he posted a 2.77 ERA and 65-to-13 strikeout-to-walk ratio in 54 innings, which would be extremely impressive from a 22-year-old if it didn't come attached to all his previous disappointment.

Guerra threw much harder at 17 than he did at 22, but the 6-foot-5 right-hander's fastball still reaches the low-90s and his changeup remains an oft-praised pitch. Despite being younger than many Single-A players Guerra has spent two seasons in the high minors and is already on the 40-man roster, so picking up where he left off in the second half of last season could get him into the Twins' bullpen mix in a hurry.

26. Manuel Soliman | Starter | DOB: 8/89 | Throws: Right | Sign: Dominican

YEAR     LV      G     GS      ERA        IP       H     HR      SO     BB
2009     DSL    14     14     2.15      71.0      66      0      55     20
2010     RK+    12     12     3.48      64.2      47      5      74     21
2011     A-     28     25     3.97     136.0     128     17     120     50

Manuel Soliman signed with the Twins out of the Dominican Republic as a 17-year-old third baseman in 2007, but shifted to the mound after hitting just .199 with a .288 slugging percentage in two summer league seasons. He experienced immediate success as a pitcher and has turned himself into a legitimate prospect, throwing 272 innings with a 3.38 ERA and 249 strikeouts through three seasons.

After overpowering the similarly inexperienced rookie-ball competition in 2009 and 2010 his rough edges were more prevalent last year, as Soliman made his full-season debut at low Single-A and walked 3.3 batters per nine innings while serving up 17 homers in 136 innings. Poor control is to be expected from a 21-year-old with his background and at first glance 17 long balls in 136 innings is reasonable, but the Midwest League as a whole slugged just .370.

Soliman has good raw stuff, with a low-90s fastball and hard slider, but the 6-foot-2 right-hander seems more likely to wind up in the bullpen long term considering his late start to pitching and lack of refinement. He'll stay on the starter track for now and likely spend most of this season at high Single-A, so don't expect Soliman to appear on the Twins' radar for a while even if things go well in Fort Myers.