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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
|---|---|---|---|---|---|---|---|---|---|---|---|
| O'Donoghue, John P. | RP | Free Agent | 25 | 05/26/1969 | Wilmington | USA | Left | Left | 6' 6" | 200 lbs | - |
| O'Halloran, Greg | C | New York Mets | 26 | 05/21/1968 | Toronto | CAN | Left | Right | 6' 2" | 205 lbs | - |
| O'Leary, Troy | LF | Baltimore Orioles | 25 | 08/04/1969 | Compton | USA | Left | Left | 6' 0" | 200 lbs | - |
| O'Neal, Randy | RP | Free Agent | 34 | 08/30/1960 | Ashland | USA | Right | Right | 6' 2" | 200 lbs | - |
| O'Neill, Paul | LF | Seattle Pilots | 31 | 02/25/1963 | Columbus | USA | Left | Left | 6' 4" | 225 lbs | - |
| Obando, Sherman | RF | Free Agent | 24 | 01/23/1970 | Bocas del Toro | PAN | Right | Right | 6' 4" | 220 lbs | - |
| Ochiai, Hiromitsu | 3B | Los Angeles Dodgers | 40 | 12/09/1953 | Osaka | JPN | Right | Right | 5' 10" | 200 lbs | - |
| Offerman, Jose | 1B | Cincinnati Reds | 25 | 11/08/1968 | Unknown | DOM | Switch | Right | 6' 0" | 175 lbs | - |
| Ogea, Chad | RP | Washington Senators | 23 | 11/09/1970 | Lake Charles | USA | Right | Right | 6' 2" | 205 lbs | - |
| Ojeda, Bob | SP | Colorado Rockies | 36 | 12/17/1957 | Los Angeles | USA | Left | Left | 6' 1" | 195 lbs | - |
| Olander, Jim | CF | San Diego Padres | 31 | 02/21/1963 | Tucson | USA | Right | Right | 6' 1" | 190 lbs | - |
| Olerud, John | 1B | Kansas City Royals | 26 | 08/05/1968 | Seattle | USA | Left | Left | 6' 5" | 220 lbs | - |
| Olin, Steve | RP | St. Louis Cardinals | 29 | 10/04/1965 | Portland | USA | Right | Right | 6' 3" | 190 lbs | - |
| Oliva, Jose | 3B | Minnesota Twins | 23 | 03/03/1971 | Unknown | DOM | Right | Right | 6' 1" | 150 lbs | - |
| Olivares, Omar | SP | San Francisco Giants | 27 | 07/06/1967 | Unknown | PUR | Right | Right | 6' 1" | 190 lbs | - |
| Oliver, Darren | SP | Minnesota Twins | 24 | 10/06/1970 | Kansas City | USA | Right | Left | 6' 2" | 205 lbs | - |
| Oliver, Joe | C | Seattle Pilots | 29 | 07/24/1965 | Memphis | USA | Right | Right | 6' 3" | 215 lbs | - |
| Oliveras, Francisco | RP | Free Agent | 31 | 01/31/1963 | Unknown | PUR | Right | Right | 5' 10" | 170 lbs | - |
| Olson, Greg | C | Free Agent | 34 | 09/06/1960 | Marshall | USA | Right | Right | 6' 0" | 200 lbs | - |
| Olson, Gregg | RP | Pittsburgh Pirates | 28 | 10/11/1966 | Unknown | USA | Right | Right | 6' 4" | 215 lbs | - |
| Ontiveros, Steve | RP | New York Yankees | 33 | 03/05/1961 | Tularosa | USA | Right | Right | 6' 0" | 195 lbs | - |
| Oquendo, Jose | SS | Oakland Athletics | 31 | 07/04/1963 | Unknown | PUR | Switch | Right | 5' 10" | 165 lbs | - |
| Oquist, Mike | RP | Minnesota Twins | 26 | 05/30/1968 | La Junta | USA | Right | Right | 6' 2" | 170 lbs | - |
| Orsulak, Joe | CF | Minnesota Twins | 32 | 05/31/1962 | Glen Ridge | USA | Left | Left | 6' 1" | 200 lbs | - |
| Ortiz, Luis | 3B | Free Agent | 24 | 05/25/1970 | Santo Domingo | DOM | Right | Right | 6' 0" | 195 lbs | - |
| Orton, John | C | Free Agent | 28 | 12/08/1965 | Santa Cruz | USA | Right | Right | 6' 1" | 195 lbs | - |
| Osborne, Donovan | RP | Los Angeles Dodgers | 25 | 06/21/1969 | Roseville | USA | Switch | Left | 6' 2" | 210 lbs | - |
| Owen, Spike | 2B | Detroit Tigers | 33 | 04/19/1961 | Cleburne | USA | Switch | Right | 5' 10" | 170 lbs | - |
| Owens, Jayhawk | C | Free Agent | 25 | 02/10/1969 | Cincinnati | USA | Right | Right | 6' 1" | 200 lbs | - |
