Octavio Dotel
Odalis Perez
Oddibe McDowell
Odell Hale
Odell Jones
Odrisamer Despaigne
Odubel Herrera
Oil Can Boyd
Old Hoss Radbourn
Ole Olsen
Oliver Drake
Oliver Perez
Ollie Bejma
Ollie Brown
Ollie Pickering
Olmedo Saenz
Omar Daal
Omar Infante
Omar Moreno
Omar Narvaez
Omar Olivares
Omar Quintanilla
Omar Vizquel
Onan Masaoka
Oral Hildebrand
Orator Shafer
Orel Hershiser
Orestes Destrade
Orie Arntzen
Oris Hockett
Orlando Arcia
Orlando Cabrera
Orlando Cepeda
Orlando Hernandez
Orlando Hudson
Orlando Merced
Orlando Miller
Orlando Palmeiro
Orlando Pena
Orlie Weaver
Orval Grove
Orval Overall
Orville Jorgens
Oscar Fuhr
Oscar Gamble
Oscar Grimes
Oscar Horstmann
Oscar Jones
Oscar Judd
Oscar Mercado
Oscar Salazar
Oscar Stanage
Oscar Tuero
Oscar Villarreal
Oscar Walker
Oscar Zamora
Ossee Schrecongost
Ossie Bluege
Ossie Orwoll
Osvaldo Fernandez
Oswaldo Arcia
Oswaldo Peraza
Otis Brannan
Otis Lambeth
Otis Nixon
Otto Hess
Otto Knabe
Otto Velez
Owen Friend
Ownie Carroll
Oyster Burns
Ozzie Albies
Ozzie Guillen
Ozzie Smith
Ozzie Timmons
Ozzie Virgil
Ozzie Virgil