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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| O'Brien, Andrew | SP | Tampa Yankees | 27 | 03/07/1983 | The Hammocks | USA | Switch | Left | 6' 3" | 219 lbs | - |
| O, Chae-seong | 2B | Jupiter Hammerheads | 27 | 07/07/1983 | Seoul | KOR | Switch | Right | 6' 2" | 215 lbs | - |
| Oglethorpe, Steve | MR | Lakeland Flying Tigers | 25 | 12/14/1984 | Cathedral City | USA | Right | Right | 6' 7" | 215 lbs | - |
| Olsen, Travis | MR | Sarasota Reds | 22 | 07/23/1988 | Youngsville | USA | Switch | Right | 6' 1" | 220 lbs | - |
| Ortíz, Félix | LF | Tampa Yankees | 23 | 11/06/1986 | Santo Domingo | DOM | Right | Right | 6' 1" | 190 lbs | - |
| Ortíz, Luis | MR | Charlotte Stone Crabs | 21 | 06/28/1989 | Bowie | USA | Left | Left | 6' 0" | 200 lbs | - |
