| 42 | Chris Antonelli | OF | NCAA | 5-11 | 195 | Right | Right | 7/13/1989 | 21 | Miami,Florida | | UDFA | | |
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| 5 | Payton Bieker | C-OF | NCAA | 5-10 | 165 | Right | Right | 12/20/1988 | 22 | Fort Wayne,Indiana | | UDFA | | |
| 38 | Kyle Bischoff | C | NCAA | 6-0 | 185 | Both | Right | 8/29/1989 | 21 | Decatur,Indiana | | UDFA | | |
| 15 | David Blount | IF | NCAA | 6-0 | 180 | Right | Right | 12/15/1987 | 23 | Miami,Florida | | UDFA | | |
| 45 | Lance Breedlove | P | A | 6-1 | 180 | Right | Right | 9/1/1990 | 20 | Long Beach,California | 2012 | 23 | 706 | PIT |
| 21 | Ryan Bridges | IF | NCAA | 6-0 | 200 | Right | Right | 9/21/1988 | 22 | Munster,Indiana | | UDFA | | |
| 31 | Nick Burke | IF | NCAA | 5-11 | 160 | Right | Right | 10/16/1989 | 21 | Indianapolis,Indiana | | UDFA | | |
| 32 | Tyler Calder | P | NCAA | 6-4 | 170 | Right | Right | 4/12/1990 | 21 | Fortville,Indiana | | UDFA | | |
| 2 | Eric Charles | 2B | A- | 5-10 | 175 | Right | Right | 12/18/1988 | 22 | Chicago,Illinois | 2012 | 29 | 885 | SD |
| 8 | Angelo Cianfrocco | 1B-OF | NCAA | 6-2 | 180 | Left | Left | 11/2/1990 | 20 | Rome,New York | | UDFA | | |
| 16 | Patrick Coghlan | C | NCAA | 5-7 | 165 | Right | Right | 9/15/1989 | 21 | Anaheim,California | | UDFA | | |
| 37 | Sean Collins | P | NCAA | 6-5 | 210 | Right | Right | 8/15/1989 | 21 | Indianapolis,Indiana | | UDFA | | |
| 9 | Collin Dedecker | H | NCAA | | | | | | - | | | UDFA | | |
| 11 | Andrew Dixon | OF | NCAA | 5-10 | 174 | Left | Right | 7/1/1980 | 30 | Lafayette,Louisiana | | UDFA | | |
| 7 | Pat Gannon | P | NCAA | 6-0 | 180 | Right | Left | 7/16/1991 | 19 | Oak Lawn,Illinois | | UDFA | | |
| 27 | Matt Gibbs | P | NCAA | 6-4 | 215 | Right | Right | 2/14/1992 | 19 | Columbus,Ohio | | UDFA | | |
| 35 | Calvin Gunter | P | NCAA | 6-0 | 165 | Left | Left | 7/20/1988 | 22 | Noblesville,Indiana | | UDFA | | |
| 1 | Joe Haase | OF-P | NCAA | 5-11 | 160 | Right | Right | 10/20/1989 | 21 | Greenfield,Indiana | | UDFA | | |
| 6 | Jake Hansen | IF | NCAA | 5-8 | 155 | Right | Right | 2/21/1990 | 21 | Chicago,Illinois | | UDFA | | |
| 13 | Blake Mascarello | P | A | 6-1 | 200 | Left | Left | 6/25/1989 | 22 | Crown Point,Indiana | | UDFA | | |
| 17 | Sean Mchugh | C-1B | NCAA | 5-11 | 195 | Right | Right | 4/19/1992 | 19 | Indianapolis,Indiana | | UDFA | | |
| 29 | David Miller | IF | NCAA | 5-8 | 170 | Left | Right | 5/31/1990 | 21 | St. Louis,Missouri | | UDFA | | |
| 18 | Matt Morgan | P | NCAA | 5-11 | 170 | Right | Right | 4/29/1988 | 23 | Indianapolis,Indiana | | UDFA | | |
| 22 | Cameron Perkins | 1B-3B | A+ | 6-5 | 195 | Right | Right | 9/27/1990 | 20 | Beaumont,Texas | 2012 | 6 | 218 | PHI |
| 26 | Kevin Plawecki | C | A | 6-1 | 200 | Right | Right | 2/26/1991 | 20 | Hinsdale,Illinois | 2012 | 1 | 35 | NYM |
| 43 | Robert Ramer | P | NCAA | 6-3 | 170 | Right | Right | 7/4/1990 | 20 | Palo Alto,California | | UDFA | | |
| 40 | Brad Schreiber | P | NCAA | 6-4 | 235 | Right | Right | 2/13/1991 | 20 | Appleton,Wisconsin | 2012 | 40 | 1210 | MIN |
| 23 | Barrett Serrato | 1B | A- | 6-2 | 185 | Left | Right | 9/1/1990 | 20 | West Chicago,Illinois | 2012 | 30 | 936 | TEX |
| 44 | Tyler Spillner | OF | NCAA | 6-1 | 185 | Left | Right | 5/24/1989 | 22 | Fort Wayne,Indiana | | UDFA | | |
| 39 | Mike Sudbury | P | NCAA | 6-7 | 200 | Left | Left | 9/16/1988 | 22 | Highland,Indiana | | UDFA | | |
| 36 | Stephen Talbott | OF | NCAA | 6-3 | 195 | Right | Right | 9/26/1990 | 20 | San Diego,California | | UDFA | | |
| 28 | Nick Wittgren | P | A+ | 6-3 | 205 | Right | Right | 5/29/1991 | 20 | Torrance,California | 2012 | 9 | 287 | MIA |