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					| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |  
		| O'Brien, Keith | RP | Winston-Salem Dash | 22 | 11/16/2028 | Rowlett | USA | Left | Left | 6' 2" | 195 lbs | - |  
		| O'Connor, Austin | SP | Salem Red Sox | 24 | 11/12/2026 | Anaheim | USA | Right | Right | 6' 4" | 200 lbs | - |  
		| O'Donnell, Jonathan | RP | Free Agent | 30 | 02/03/2020 | Farwell | USA | Left | Left | 6' 5" | 200 lbs | - |  
		| Obawole, Torquato | 2B | Jupiter Hammerheads | 27 | 02/01/2023 | Quinhamel | GNB | Right | Right | 6' 1" | 200 lbs | - |  
		| Odle, Jon | LF | Salem Red Sox | 19 | 09/28/2031 | New York | USA | Switch | Right | 6' 2" | 180 lbs | - |  
		| Oetker, Terry | 1B | Fort Myers Miracle | 23 | 04/12/2027 | Euless | USA | Right | Right | 6' 5" | 200 lbs | $675,000 |  
		| Olander, Jacob | 1B | St. Lucie Mets | 20 | 11/02/2030 | Memphis | USA | Right | Right | 6' 1" | 175 lbs | - |  
		| Olivares, C.J. | LF | Brevard County Manatees | 25 | 01/22/2025 | Brooklyn | USA | Switch | Right | 6' 2" | 205 lbs | - |  
		| Olson, Paul | SP | Stockton Ports | 21 | 01/06/2029 | Carrollton | USA | Switch | Right | 6' 2" | 190 lbs | - |  
		| Olujimi, Iften | SS | Tampa Yankees | 27 | 07/13/2023 | Cape Town | RSA | Right | Right | 6' 1" | 200 lbs | - |  
		| Olvera, Antonio | SP | Lynchburg Hillcats | 22 | 05/02/2028 | La Joya | MEX | Right | Right | 6' 4" | 180 lbs | - |  
		| Olvera, Tony | CF | Potomac Nationals | 20 | 02/02/2030 | Waspan | NCA | Left | Left | 6' 4" | 185 lbs | - |  
		| Orantez, Bobby | 3B | Jupiter Hammerheads | 21 | 10/11/2029 | Roxana | CRC | Right | Right | 6' 1" | 195 lbs | - |  
		| Orellana, Luis | CF | Frederick Keys | 21 | 08/08/2029 | San Vicente | CRC | Left | Left | 6' 0" | 180 lbs | - |  
		| Orengo, Melvin | SP | Myrtle Beach Pelicans | 22 | 08/29/2028 | El Viejo | NCA | Right | Right | 6' 4" | 180 lbs | - |  
		| Orozco, Armando | SP | Palm Beach Cardinals | 18 | 05/13/2032 | Ibagué | COL | Left | Left | 6' 0" | 170 lbs | - |  
		| Orozco, Dan | SS | Myrtle Beach Pelicans | 22 | 05/21/2028 | Hot Springs | USA | Right | Right | 5' 11" | 190 lbs | - |  
		| Orr, Bryant | SP | Frederick Keys | 26 | 08/09/2024 | Kennewick | USA | Right | Right | 6' 2" | 205 lbs | - |  
		| Ortega, Franklin | 3B | Potomac Nationals | 21 | 05/15/2029 | Havana | CUB | Right | Right | 6' 2" | 195 lbs | - |  
		| Ortega, Jesus | RP | Palm Beach Cardinals | 21 | 02/20/2029 | Villa Rosario | PAN | Switch | Right | 6' 0" | 190 lbs | - |  
		| Ortiz, Victor | RP | Dunedin Blue Jays | 22 | 03/06/2028 | Vega Alta | PUR | Right | Right | 6' 4" | 200 lbs | - |  
		| Osborne, Harry | SP | Potomac Nationals | 27 | 10/04/2023 | Trois-Rivières | CAN | Left | Left | 6' 6" | 205 lbs | - |  
		| Osborne, Jack | SP | Palm Beach Cardinals | 22 | 08/26/2028 | Melbourne | AUS | Right | Left | 6' 8" | 200 lbs | - |  
		| Osting, Chris | RF | Modesto Nuts | 26 | 08/14/2024 | North Creek | USA | Right | Right | 6' 2" | 200 lbs | - |  
		| Osumi, Yasushi | RP | Modesto Nuts | 36 | 04/02/2014 | Saijo | JPN | Left | Right | 6' 4" | 205 lbs | - |  
		| Osuna, Bellchior | C | Winston-Salem Dash | 20 | 06/01/2030 | Petare | VEN | Right | Right | 6' 4" | 200 lbs | - |  
		| Ott, Butch | SP | Wilmington Blue Rocks | 25 | 05/20/2025 | Suffolk | USA | Left | Left | 6' 4" | 200 lbs | - |  
		| Oya, Kunimatsu | SS | Free Agent | 28 | 02/02/2022 | Iwaki | JPN | Right | Right | 6' 0" | 200 lbs | - |  
		| Oyola, Antonio | LF | Bakersfield Blaze | 25 | 07/28/2025 | Mariara | VEN | Right | Right | 6' 3" | 200 lbs | - |  |