Oaks, Trevor
Oana, Prince
Oates, Johnny
Obando, Sherman
Oberholtzer, Brett
Oberkfell, Ken
O'Berry, Mike
Oberg, Scott
Obermueller, Wes
Obradovich, Jim
O'Brien, Bob
O'Brien, Charlie
O'Brien, Dan
O'Brien, Eddie
O'Brien, Johnny
O'Brien, Dink
O'Brien, Pete
O'Brien, Peter
O'Brien, Ray
O'Brien, Syd
O'Brien, Tommy
Ochoa, Alex
Ochoa, Ivan
Ockey, Walter
Ock, Whitey
O'Connor, Brian
O'Connell, Danny
O'Connor, Jack
O'Connell, Jimmy
O'Connell, John
O'Connor, Johnny
O'Connor, Mike
O'Day, Darren
O'Dea, Ken
O'Dea, Paul
O'Dell, Billy
Odenwald, Ted
Odom, Dave
Odom, Heinie
Odom, Joseph
Odom, Blue Moon
O'Donnell, George
O'Donnell, Harry
O'Donoghue, John
O'Donoghue, John
Odorizzi, Jake
Odor, Rougned
O'Doul, Lefty
Oelkers, Bryan
Oeltjen, Trent
Oertel, Chuck
Oeschger, Joe
Oester, Ron
O'Farrell, Bob
Offerman, Jose
Office, Rowland
O'Flaherty, Eric
Ogando, Alexi
Ogando, Nefi
Ogden, Curly
Ogden, Jack
Ogea, Chad
Oglesby, Jim
Oglivie, Ben
O'Grady, Brian
O'Grady, Chris
Ogrodowski, Bruce
Ogrodowski, Joe
O'Halloran, Greg
O'Hearn, Ryan
Ohka, Tomo
Ohlendorf, Ross
Ohlman, Mike
Ohman, Will
Ohme, Kevin
Oh, Seung Hwan
Ohtani, Shohei
Ojala, Kirt
Ojeda, Augie
Ojeda, Bob
Ojeda, Miguel
Okajima, Hideki
Okert, Steven
Okrie, Frank
Okrie, Len
Olander, Jim
Oldham, Red
Oldis, Bob
Oldring, Rube
O'Leary, Troy
Olerud, John
Olin, Steve
Oliver, Al
Oliver, Andy
Oliver, Bob
Olivo, Chi-Chi
Oliver, Darren
Olivo, Diomedes
Oliver, Dave
Olivares, Edward
Olivares, Ed
Oliveras, Francisco
Oliver, Gene
Olivera, Hector
Oliver, Joe
Oliva, Jose
Oliva, Jared
Oliveros, Lester
Olivo, Miguel
Oliver, Nate
Olivares, Omar
Oliver, Tom
Oliva, Tony
Ollom, Jim
Olmedo, Ray
Olmos, Edgar
Olmo, Luis
Olmsted, Al
Olsen, Barney
Olsen, Kevin
Olsen, Ole
Olsen, Scott
Olsen, Vern
Olson, Gregg
Olson, Greg
Olson, Garrett
Olson, Ivy
Olson, Karl
Olson, Matt
Olson, Marv
Olson, Tim
Olson, Tyler
Olson, Ted
Olt, Mike
Olwine, Ed
O'Malley, Ryan
O'Malley, Shawn
O'Malley, Tom
O'Mara, Ollie
Omogrosso, Brian
Ona, Jorge
Ondrusek, Logan
O'Neal, Randy
O'Neal, Skinny
O'Neill, Emmett
O'Neill, Harry
O'Neill, Harry
O'Neil, John
O'Neill, Jim
O'Neil, Mickey
O'Neill, Paul
O'Neill, Steve
O'Neill, Tyler
Onis, Curly
Onslow, Eddie
Onslow, Jack
Ontiveros, Steve
Ontiveros, Steve
Oquendo, Jose
Oquist, Mike
Oravetz, Ernie
Ordaz, Luis
Ordenana, Tony
Ordonez, Magglio
Ordonez, Rey
Orengo, Joe
Orf, Nate
Orie, Kevin
O'Riley, Don
Orlando, Paulo
Orme, George
Oropesa, Eddie
Orosco, Jesse
O'Rourke, Frank
O'Rourke, Ryan
Orrell, Joe
Orr, Pete
Orsatti, Ernie
Orsino, John
Orsulak, Joe
Orta, Jorge
Ortega, Anthony
Ortenzio, Frank
Ortega, Jose
Ortega, Phil
Ortega, Rafael
Ortiz, David
Ortiz, Danny
Ortiz, Hector
Ortiz, Junior
Ortiz, Javier
Ortiz, Jose
Ortiz, Joe
Ortiz, Jose
Ortiz, Luis
Ortiz, Luis
Ortiz, Russ
Ortiz, Ramon
Ortiz, Roberto
Ortmeier, Daniel
Orton, John
Orvella, Chad
Orwoll, Ossie
Osborne, Bobo
Osborn, Bob
Osborne, Donovan
Osborn, Ozzie
Osburn, Pat
Osborne, Tiny
Osborne, Wayne
Osgood, Charlie
Osich, Josh
Osik, Keith
Osinski, Dan
Osoria, Franquelis
Oster, Bill
Osteen, Claude
Osteen, Darrell
Ostermueller, Fritz
Osting, Jimmy
Ostrosser, Brian
Ostrowski, Joe
Ostrowski, Johnny
O'Sullivan, Sean
Osuna, Al
Osuna, Antonio
Osuna, Jose
Osuna, Roberto
Oswalt, Corey
Oswalt, Roy
Otanez, Willis
Otero, Dan
Otero, Ricky
Otero, Reggie
Otis, Amos
O'Toole, Denny
O'Toole, Jim
Otsuka, Akinori
Ottavino, Adam
Ott, Billy
Ott, Ed
Otten, Jim
Ott, Mel
Otto, Dave
Ouellette, Phil
Oulliber, Johnny
Outen, Chink
Outlaw, Jimmy
Outman, Josh
Overton, Dillon
Overbay, Lyle
Overy, Mike
Overmire, Stubby
Oviedo, Johan
Owchinko, Bob
Owen, Dave
Owens, Eric
Owens, Henry
Owens, Henry
Owens, Jayhawk
Owens, Jerry
Owens, Jim
Owens, Jack
Owen, Larry
Owen, Mickey
Owen, Marv
Owens, Rudy
Owen, Spike
Owings, Chris
Owings, Micah
Ownbey, Rick
Oxspring, Chris
Oyler, Ray
Ozmer, Doc
Ozuna, Marcell
Ozuna, Pablo