| 12/31/2018 | ||||||
 |
|
| O |
| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| O'Brien, Dave | 2B | Bemidji Benders | 22 | 05/08/1996 | Tucson | USA | Right | Right | 5' 10" | 195 lbs | - |
| O'Cloonan, Kent | 1B | Plumstead Eagles | 24 | 09/07/1994 | Hammond | USA | Right | Right | 6' 0" | 205 lbs | - |
| O'Neil, Dave | SS | Minnesota Death Stars | 24 | 02/28/1994 | Chicago | USA | Right | Right | 5' 9" | 185 lbs | - |
| Orama, Freddy | CF | Free Agent | 27 | 10/26/1991 | Acton | USA | Right | Right | 6' 1" | 160 lbs | - |
| Ortega, Jorge | 3B | Plumstead Eagles | 19 | 02/13/1999 | Las Tunas | CUB | Right | Right | 6' 2" | 195 lbs | - |
| Ortega, José | 2B | Manhatten Meatheads | 19 | 11/29/1999 | Bayamón | PUR | Right | Right | 6' 2" | 220 lbs | - |
| Ortega, José | MR | Bemidji Benders | 23 | 03/23/1995 | Dallas | USA | Left | Left | 6' 0" | 235 lbs | - |
| Ortíz, José | MR | Free Agent | 24 | 07/01/1994 | Irvington | USA | Right | Right | 6' 1" | 220 lbs | - |
| Ouyang, Gui | 1B | Wisconsin Rapids Rangers | 30 | 09/02/1988 | Kelowna | CAN | Left | Left | 6' 0" | 233 lbs | - |
