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Players: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z Player Index | Career Batting Register | Career Pitching Register Player From-To Avg HR RBI W L SV ERA K Mark O'Brian 2006-2006 .000 0 0 0 7 12 4.09 14 Bob O'Brien 1993-2000 .261 3 20 0 0 0 0.00 0 Cole O'Brien 1997-1998 .000 0 0 2 4 2 4.18 10 Earl O'Brien 1992-1992 .000 0 0 5 2 0 3.02 59 Gerald O'Brien 1992-1995 .000 0 0 7 4 9 2.86 49 Guy O'Brien 2012-2012 .366 6 36 0 0 0 0.00 0 Jonathan O'Brien 2009-2009 .000 0 0 0 0 1 4.91 2 Morton O'Brien 1993-1993 .000 0 0 0 0 0 0.00 3 Ronald O'Bryan 2011-2018 .000 0 0 4 3 1 2.93 30 Larry O'Colgan 1990-1990 .000 0 0 2 1 0 0.90 12 Brandon O'Connor 2019-2022 .277 30 234 0 0 0 0.00 0 Charlie O'Connor 2010-2011 .199 1 51 0 0 0 0.00 0 Nick O'Connor 0-0 .000 0 0 0 0 0 0.00 0 Oscar O'Connor 1996-1996 .000 0 0 1 3 1 8.20 16 Johnny O'Creagh 2025-2025 .000 0 0 4 6 27 4.17 38 Tim O'Cullenan 1997-1997 .333 1 5 0 0 0 0.00 0 Stephen O'Danaher 2014-2015 .227 3 43 0 0 0 0.00 0 Bob O'Day 1993-1995 .296 8 46 0 0 0 0.00 0 Jacob O'Day 2002-2011 .000 0 0 7 5 9 2.25 79 Mark O'Day 2002-2004 .304 8 80 0 0 0 0.00 0 Bill O'Dell 2007-2007 .000 0 0 1 1 1 4.70 4 Tom O'Dell 2000-2001 .187 2 31 0 0 0 0.00 0 Jerry O'Donnell 2006-2007 .281 2 22 0 0 0 0.00 0 Mark O'Donnell 2023-2025 .250 2 54 0 0 0 0.00 0 John O'Doran 2018-2019 .218 1 59 0 0 0 0.00 0 Ben O'Ferrall 2017-2018 .245 6 45 0 0 0 0.00 0 Andre O'Grotty 2008-2008 .000 0 0 2 0 0 0.00 12 Jimmy O'Halloran 2016-2016 .000 0 0 1 0 0 0.60 17 Stewart O'Halloran 1993-2005 .373 0 9 0 0 0 0.00 0 Ed O'Herlihy 2001-2001 .000 0 0 7 6 0 3.06 54 Player From-To Avg HR RBI W L SV ERA K Todd O'Herlihy 2025-2025 .000 0 0 1 1 0 3.16 41 Kenny O'Higgins 1991-1994 .230 1 53 0 0 0 0.00 0 Mike O'Higgins 1991-1996 .260 0 17 0 0 0 0.00 0 Tim O'Higgins 2010-2010 .262 6 55 0 0 0 0.00 0 Billy O'Kane 1993-1994 .200 1 9 0 0 0 0.00 0 Samuel O'Keefe 2014-2015 .000 0 0 6 4 2 2.37 76 William O'Keefe 2002-2003 .275 0 34 0 0 0 0.00 0 Woodrow O'Leary 0-0 .000 0 0 0 0 0 0.00 0 William O'Lehan 2009-2011 .272 6 62 0 0 0 0.00 0 Jon O'Liddy 2010-2010 .333 0 0 0 0 0 0.00 0 Gus O'Maginn 1993-1995 .232 2 33 0 0 0 0.00 0 Will O'Mulgee 2014-2015 .224 2 65 0 0 0 0.00 0 Mark O'Mulledy 2022-2023 .241 5 51 0 0 0 0.00 0 Curt O'Mullen 2019-2019 .000 0 0 9 5 0 1.90 142 Brandon O'Mulvany 1991-1997 .182 3 31 0 0 0 0.00 0 Jude O'Neal 2018-2018 .000 0 0 1 1 0 0.00 13 Kevin O'Neal 2023-2024 .000 0 0 7 14 0 3.17 113 Mel O'Neal 2018-2022 .184 2 23 0 0 0 0.00 0 Cedric O'Neill 2016-2018 .250 23 98 0 0 0 0.00 0 Mark O'Neil 1994-1995 .000 0 0 4 6 0 4.88 9 Paul O'Neil 2012-2013 .000 0 0 2 0 5 0.60 24 Barry O'Neill 1993-1995 .302 10 98 0 0 0 0.00 0 Nelson O'Quinlan 1997-1997 .143 0 0 0 0 0 0.00 0 Eric O'Quinn 2003-2005 .317 3 47 0 0 0 0.00 0 Jason O'Quinn 2007-2007 .280 1 6 0 0 0 0.00 0 Joel O'Quinn 2014-2014 .000 0 0 1 1 3 1.85 12 Joe O'Reilly 1995-1997 .000 0 0 1 0 1 3.82 9 Ronald O'Rourke 1992-1993 .224 0 9 0 0 0 0.00 0 Patrick O'Sheill 2012-2013 .228 9 71 0 0 0 0.00 0 Bob O'Shiel 2016-2019 .234 27 154 0 0 0 0.00 0 Player From-To Avg HR RBI W L SV ERA K Alfred O'Sullivan 2010-2019 .236 0 26 0 0 0 0.00 0 Guy O'Sullivan 1994-1996 .000 0 0 2 2 3 2.51 11 Davey O'Toole 1998-2005 .340 3 28 0 0 0 0.00 0 Ken O'Toole 1999-2000 .000 0 0 8 6 0 2.99 87 Tony O'Vesy 1991-1992 .299 6 58 0 0 0 0.00 0 Amrus Obote 2023-2024 .223 2 12 0 0 0 0.00 0 António Ocampo 2025-2025 .000 0 0 12 3 0 2.16 126 Miguel Ocampo 1991-1991 .308 0 2 0 0 0 0.00 0 Arturo Ocasio 2015-2016 .000 0 0 5 0 5 1.87 34 Andrés Ochoa 2011-2011 .247 3 39 0 0 0 0.00 0 Ángel Ochoa 1991-1992 .245 0 35 0 0 0 0.00 0 Jorge Ochoa 2016-2016 .000 0 0 13 4 0 2.36 89 David Ochs 2012-2012 .148 0 1 0 0 0 0.00 0 Terence Odgers 2014-2014 .172 1 17 0 0 0 0.00 0 Curt Odom 1990-1990 .000 0 0 0 0 0 0.00 1 Michihiro Ogasahara 2019-2021 .212 3 44 0 0 0 0.00 0 Suezo Ogawa 2021-2024 .000 0 0 5 5 13 3.25 45 Andy Oglethorpe 2017-2017 .000 0 0 1 0 0 0.45 22 Brian Oglethorpe 1997-1997 .000 0 0 5 4 0 5.65 20 Kumanosuke Ohara 2025-2025 .000 0 0 0 0 0 0.00 0 Katai Ohayashi 2022-2024 .302 4 25 0 0 0 0.00 0 Sumitomo Ohayashi 2021-2022 .000 0 0 0 0 0 0.89 8 Sumitomo Ohba 2022-2022 .000 0 0 4 0 3 0.70 75 Henry Ohler 2025-2025 .260 0 18 0 0 0 0.00 0 Rodney Ohler 2019-2020 .220 5 54 0 0 0 0.00 0 Hirohisa Oike 2016-2020 .179 1 10 0 0 0 0.00 0 Kazuhiro Oike 2022-2022 .000 0 0 4 3 32 1.22 30 Noriyuki Oishi 1990-1990 .332 0 22 0 0 0 0.00 0 Raúl Ojeda 2020-2025 .333 7 85 0 0 0 0.00 0 Kiyonori Ojima 2016-2022 .261 23 98 0 0 0 0.00 0 Player From-To Avg HR RBI W L SV ERA K Sami Ojo 2019-2019 .000 0 0 2 1 0 0.45 52 Takaaki Oka 2016-2020 .000 0 0 0 1 1 2.16 14 Ken Okabe 1990-1990 .000 0 0 2 4 0 4.82 17 Yasujiro Okada 2023-2025 .298 0 17 0 0 0 0.00 0 Kantaro Okamura 2021-2022 .264 12 49 0 0 0 0.00 0 Shoichi Okazaki 2024-2025 .000 0 0 4 0 2 3.22 66 Herman Olieman 2023-2025 .322 5 98 0 0 0 0.00 0 Judite Oliva 1998-2002 .373 5 51 0 0 0 0.00 0 Xavier Oliva 2009-2012 .000 0 0 55 32 0 2.65 716 José Olivas 2012-2014 .275 9 113 0 0 0 0.00 0 Luis Oliveira 2014-2016 .175 9 35 0 0 0 0.00 0 Aaron Oliver 2001-2003 .352 6 29 0 0 0 0.00 0 Al Oliver 2014-2014 .000 0 0 7 12 0 4.63 72 Phil Oliver 2023-2023 .000 0 0 0 2 0 4.96 43 Willie Olsen 2014-2025 .000 0 0 3 0 4 1.00 20 Collin Olson 1991-1992 .295 3 21 0 0 0 0.00 0 Joe Olson 1993-1997 .254 2 33 0 0 0 0.00 0 Tekle-Mariam Olubayo 2025-2025 .385 1 7 0 0 0 0.00 0 David Olvera 2019-2019 .000 0 0 15 5 0 3.01 92 Jaime Olvera 2020-2021 .000 0 0 17 12 0 2.80 308 Lúcio Olvera 2016-2017 .000 0 0 13 9 0 4.30 130 Gong-sun Ong 2020-2022 .332 1 62 0 0 0 0.00 0 Kenji Ono 2015-2016 .230 1 31 0 0 0 0.00 0 Teruo Ono 2019-2022 .343 4 35 0 0 0 0.00 0 Rubén Ontiveros 2021-2024 .000 0 0 27 18 5 2.82 351 Wladimir Op den Kamp 2023-2025 .297 6 121 0 0 0 0.00 0 Pedro Ordóńez 2025-2025 .000 0 0 5 3 0 2.03 48 León Ornelas 1990-1990 .346 3 32 0 0 0 0.00 0 António Orozco 2000-2004 .306 6 81 0 0 0 0.00 0 Carlos Oroz 1993-1993 .000 0 0 1 0 0 1.13 7 Player From-To Avg HR RBI W L SV ERA K Ignacio Orozco 2019-2019 .458 0 2 0 0 0 0.00 0 Jesús Orozco 2015-2015 .000 0 0 12 7 0 2.12 77 Jorge Orozco 2025-2025 .199 4 36 0 0 0 0.00 0 Ramiro Orozco 1999-2001 .251 0 36 0 0 0 0.00 0 Larry Orr 1992-1993 .286 0 0 0 0 0 0.00 0 Félix Ortega 2023-2024 .305 2 103 0 0 0 0.00 0 Félix Ortega 1994-2007 .267 4 90 0 0 0 0.00 0 Gerardo Ortega 1991-1991 .000 0 0 0 1 16 2.91 9 José Ortega 2009-2016 .000 0 0 14 18 2 3.55 107 Norberto Ortega 2017-2024 .000 0 0 4 3 6 3.15 90 Pablo Ortega 2025-2025 .304 9 43 0 0 0 0.00 0 Pancho Ortega 1990-1994 .000 0 0 18 15 0 3.64 159 Rubén Ortega 0-0 .000 0 0 0 0 0 0.00 0 Ramiro Ortegón 1990-1993 .000 0 0 1 1 1 2.00 22 Alberto Ortíz 2008-2011 .000 0 0 14 14 0 2.00 117 Ángel Ortíz 2003-2005 .298 3 63 0 0 0 0.00 0 Aurelio Ortíz 1998-1999 .258 1 35 0 0 0 0.00 0 Aurelio Ortíz 2007-2007 .280 1 27 0 0 0 0.00 0 Cory Ortíz 0-0 .000 0 0 0 0 0 0.00 0 Edgar Ortíz 1998-1998 .245 3 19 0 0 0 0.00 0 Eduardo Ortíz 1996-1996 .226 2 32 0 0 0 0.00 0 Eduardo Ortíz 1992-1995 .208 1 22 0 0 0 0.00 0 Fernando Ortíz 2020-2020 .274 2 11 0 0 0 0.00 0 Jorge Ortíz 2017-2021 .000 0 0 14 19 4 3.74 170 José Ortíz 2001-2003 .296 6 82 0 0 0 0.00 0 José Ortíz 1993-1993 .000 0 0 0 0 0 1.08 1 Juan Carlos Ortíz 2025-2025 .224 0 9 0 0 0 0.00 0 Orlando Ortíz 1992-2005 .371 1 31 0 0 0 0.00 0 Ramiro Ortíz 2014-2015 .226 10 74 0 0 0 0.00 0 Ricardo Ortíz 0-0 .000 0 0 0 0 0 0.00 0 Player From-To Avg HR RBI W L SV ERA K Sergio Ortíz 2021-2025 .000 0 0 1 1 2 5.09 19 Yoshitsune Osada 2017-2017 .355 7 21 0 0 0 0.00 0 Chuck Osborn 1993-2004 .000 0 0 1 0 2 3.69 27 Edmund Osborn 1990-1990 .000 0 0 1 0 0 2.33 28 Frank Osborne 2014-2015 .000 0 0 17 13 0 2.57 116 Rich Osborne 1999-1999 .274 1 13 0 0 0 0.00 0 Takafumi Oshima 2017-2018 .248 3 44 0 0 0 0.00 0 Asfaw Osogo 2014-2017 .222 0 6 0 0 0 0.00 0 Ricardo Osorio 2013-2015 .189 3 55 0 0 0 0.00 0 Kuniyuki Ota 2019-2019 .500 0 1 0 0 0 0.00 0 Masakado Ota 2015-2016 .000 0 0 10 4 19 2.88 31 Nobuyoshi Ota 2016-2019 .254 14 93 0 0 0 0.00 0 Razan Ota 2023-2024 .000 0 0 0 1 0 4.50 12 Shusaku Ota 2024-2025 .000 0 0 6 4 5 3.08 57 António Otero 2024-2025 .346 6 65 0 0 0 0.00 0 Casey Otero 2010-2012 .274 7 113 0 0 0 0.00 0 Octávio Otero 2003-2006 .000 0 0 5 1 4 2.82 34 Paco Otero 2015-2015 .000 0 0 2 4 15 3.64 41 Santiago Otero 2011-2011 .225 2 26 0 0 0 0.00 0 Charlie Ough 2015-2015 .380 2 5 0 0 0 0.00 0 Les Overdevest 2017-2017 .000 0 0 0 0 0 0.00 2 Jerrel Overgaag 2017-2018 .274 6 48 0 0 0 0.00 0 Guo Ow-Yang 1992-1993 .000 0 0 1 8 0 6.21 22 Bob Owens 2023-2023 .000 0 0 6 4 0 2.96 56 Paul Owen 2017-2024 .285 19 123 0 0 0 0.00 0 Clifford Owens 0-0 .000 0 0 0 0 0 0.00 0 Gyoo-jae O 2013-2013 .000 0 0 5 6 0 3.06 43 Charles Owens 2024-2025 .000 0 0 1 0 0 3.60 17 Jason Owens 2018-2018 .207 8 35 0 0 0 0.00 0 Jordan Owens 2014-2016 .294 8 50 0 0 0 0.00 0 Player From-To Avg HR RBI W L SV ERA K Pete Owens 2019-2019 .276 0 53 0 0 0 0.00 0 Royce Owens 2024-2024 .218 3 23 0 0 0 0.00 0 Steve Owens 2010-2011 .228 1 12 0 0 0 0.00 0 Chi-Chi Owunwanne 2021-2021 .271 0 4 0 0 0 0.00 0 Seong-ryong O 2021-2021 .000 0 0 4 1 0 2.03 43 Tom Owens 0-0 .000 0 0 0 0 0 0.00 0 Kiyomasu Ozawa 2024-2024 .125 0 0 0 0 0 0.00 0 Bold indicates a Hall of Famer.

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