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|
| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
|---|---|---|---|---|---|---|---|---|---|---|---|
| O'Donell, Aaron | RP | Houston Bayou Rats | 25 | 03/18/2009 | San Antonio | USA | Left | Left | 6' 1" | 200 lbs | $300,000 |
| O'Donnell, Dennis | C | Houston Bayou Rats | 31 | 05/31/2003 | Sudbury | CAN | Right | Right | 6' 0" | 235 lbs | $750,000 |
| O'Donnell, Leon | CF | Hollywood Stars | 31 | 03/26/2003 | Ithaca | USA | Right | Right | 6' 4" | 205 lbs | $4,760,000 |
| O'Slattery, Ken | RP | Brooklyn Superbas | 27 | 02/23/2007 | Catawissa | USA | Right | Right | 6' 5" | 215 lbs | $680,000 |
| Ochoa, Juan | CF | Seattle Pilots | 28 | 07/17/2006 | Tecpan | MEX | Right | Right | 6' 0" | 190 lbs | $300,000 |
| Ohayashi, Shinji | RF | Hollywood Stars | 21 | 06/27/2013 | Moriyama | JPN | Left | Left | 6' 2" | 195 lbs | $300,000 |
| Okada, Mitsunari | 3B | Chicago Whales | 33 | 06/22/2001 | Shiozawa | JPN | Right | Right | 6' 2" | 245 lbs | $3,120,000 |
| Okubo, Danjuro | SS | Brooklyn Superbas | 17 | 12/03/2017 | Ogori | JPN | Right | Right | 6' 0" | 175 lbs | - |
| Oliver, Stanton | RP | Miami X Giants | 30 | 01/21/2004 | Alameda | USA | Right | Left | 6' 3" | 220 lbs | $670,000 |
| Ollson, Jacob | SP | Oakland Oaks | 17 | 10/04/2017 | Brisbane | AUS | Left | Left | 6' 3" | 185 lbs | - |
| Ontiveros, Sergio | CF | Boston Beaneaters | 29 | 03/12/2005 | New York | USA | Left | Left | 5' 8" | 180 lbs | - |
| Ordóńez, Alfredo | SP | Philadelphia Quakers | 24 | 11/24/2010 | Tarragona | ESP | Right | Right | 6' 2" | 215 lbs | $540,000 |
| Ortíz, Enrique | RP | Chicago Whales | 25 | 09/10/2009 | Lazaro Cardenas | MEX | Right | Right | 6' 2" | 215 lbs | $300,000 |
| Ortíz, Iván | SP | Boston Beaneaters | 17 | 05/12/2017 | Soyapango | SLV | Right | Right | 6' 7" | 200 lbs | - |
| Ortíz, Raúl | C | Hollywood Stars | 34 | 10/05/2000 | Bay Village | USA | Right | Right | 6' 3" | 260 lbs | $34,000,000 |
| Owen, Vince | 1B | Philadelphia Quakers | 23 | 01/24/2011 | Hialeah Gardens | USA | Right | Right | 6' 3" | 210 lbs | $300,000 |
