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					| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |  
		| O'Brien, Brian | SP | Free Agent | 17 | 11/21/2029 | Baltimore | USA | Switch | Right | 6' 2" | 180 lbs | - |  
		| O'Brien, Mike | CF | Free Agent | 17 | 08/23/2029 | Pottstown | USA | Left | Left | 6' 4" | 190 lbs | - |  
		| O'Brien, R.J. | LF | Free Agent | 34 | 04/18/2012 | Danbury | USA | Left | Left | 6' 2" | 200 lbs | - |  
		| O'Connor, Josh | SP | Free Agent | 16 | 03/14/2030 | New York | USA | Left | Right | 6' 2" | 180 lbs | - |  
		| Oakes, Eric | RP | Chicago Cubs | 26 | 10/30/2020 | Mitchellville | USA | Right | Right | 6' 5" | 200 lbs | $2,860,000 |  
		| Oba, Tetsuya | 1B | Free Agent | 31 | 08/30/2015 | Yamagata | JPN | Left | Right | 6' 0" | 185 lbs | - |  
		| Ocampo, Ignacio | CF | St. Louis Cardinals | 17 | 01/15/2029 | Fajardo | PUR | Left | Left | 6' 2" | 170 lbs | - |  
		| Odom, Danny | C | California Angels | 34 | 10/27/2012 | Elkhart | USA | Right | Right | 6' 2" | 205 lbs | $26,000,000 |  
		| Ody, Adam | SP | San Francisco Giants | 25 | 04/16/2021 | Raleigh | USA | Left | Left | 6' 5" | 200 lbs | $675,000 |  
		| Ogle, Nick | DH | Cleveland Guardians | 24 | 08/28/2022 | Flora | USA | Right | Right | 6' 4" | 205 lbs | $675,000 |  
		| Ogren, Bill | RP | Colorado Rockies | 25 | 12/10/2021 | DeFuniak Springs | USA | Right | Left | 6' 2" | 200 lbs | $675,000 |  
		| Ohmer, Austin | CF | Montreal Expos | 24 | 07/17/2022 | St. Joseph | USA | Left | Right | 5' 10" | 190 lbs | $675,000 |  
		| Ohnn, Young-kwang | C | Seattle Mariners | 28 | 05/04/2018 | Incheon | KOR | Right | Right | 6' 0" | 200 lbs | $1,750,000 |  
		| Olivares, Eric | RP | Free Agent | 20 | 10/19/2026 | Mansfield | USA | Right | Right | 6' 8" | 200 lbs | - |  
		| Olsen, Mike | CF | Free Agent | 17 | 12/17/2029 | Dent | USA | Left | Left | 6' 2" | 170 lbs | - |  
		| Olson Jr., Ben | RF | Free Agent | 19 | 09/24/2027 | Highland Park | USA | Left | Left | 5' 11" | 180 lbs | - |  
		| Omura, Katsumi | SP | Free Agent | 32 | 10/24/2014 | Ago | JPN | Switch | Left | 6' 1" | 180 lbs | - |  
		| Ono, Shigeru | LF | Houston Astros | 23 | 04/22/2023 | Okinawa | JPN | Left | Left | 5' 11" | 185 lbs | $675,000 |  
		| Ornelas, Tomas | CF | Free Agent | 16 | 03/03/2030 | Bajos de Haina | DOM | Left | Right | 6' 4" | 190 lbs | - |  
		| Orosz, Earl | 3B | Free Agent | 18 | 05/11/2028 | Grain Valley | USA | Right | Right | 6' 2" | 195 lbs | - |  
		| Ortega, Kyle | SP | Free Agent | 17 | 09/03/2029 | Lawrenceville | USA | Right | Left | 6' 1" | 175 lbs | - |  
		| Ortega, Rich | RP | Free Agent | 37 | 08/27/2009 | La Vega | DOM | Right | Right | 6' 0" | 205 lbs | - |  
		| Ortiz, Tony | SP | Free Agent | 16 | 05/30/2030 | Terrell | USA | Right | Right | 5' 11" | 165 lbs | - |  
		| Orton, Ward | SS | Free Agent | 16 | 04/21/2030 | Vancouver | CAN | Right | Right | 6' 2" | 170 lbs | - |  
		| Ostrom, Jason | CF | Chicago Cubs | 25 | 10/10/2021 | Levittown | USA | Right | Right | 6' 1" | 200 lbs | $675,000 |  
		| Otero, Mario | 2B | Free Agent | 18 | 10/19/2028 | Santo Domingo | DOM | Right | Right | 6' 1" | 170 lbs | - |  
		| Ottinger, Corey | 2B | Seattle Mariners | 32 | 11/06/2014 | Madison | USA | Right | Right | 6' 2" | 200 lbs | $1,200,000 |  
		| Ou-yang, Zhi-bin | 2B | Free Agent | 34 | 12/19/2012 | Kaohsiung | TPE | Right | Right | 6' 1" | 200 lbs | - |  
		| Outen, Shane | 3B | Free Agent | 17 | 08/19/2029 | Las Vegas | USA | Right | Right | 6' 1" | 185 lbs | - |  
		| Ovando, Rafael | SS | Free Agent | 18 | 09/17/2028 | Wichita Falls | USA | Right | Right | 6' 2" | 175 lbs | - |  
		| Ovens-Toots, Kevin | SP | Atlanta Braves | 25 | 05/27/2021 | Lake Charles | USA | Right | Right | 6' 1" | 185 lbs | $22,000,000 |  
		| Overbeek, Jack | SP | Minnesota Twins | 30 | 03/13/2016 | Tytsjerksteradiel | NED | Right | Right | 6' 6" | 200 lbs | $5,700,000 |  
		| Owens, John | RP | Oakland Athletics | 26 | 07/21/2020 | Norristown | USA | Right | Right | 6' 3" | 200 lbs | $950,000 |  |