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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 W L Pct ERA G GS CG SHO SV IP H ER HR BB SO Mark O'Brian 2006-2006 0 7 .000 4.09 24 0 0 0 12 22.0 29 10 0 7 14 Cole O'Brien 1997-1998 2 4 .333 4.18 24 0 0 0 2 32.1 33 15 1 19 10 Earl O'Brien 1992-1992 5 2 .714 3.02 9 9 1 0 0 59.2 65 20 1 20 59 Gerald O'Brien 1992-1995 7 4 .636 2.86 57 0 0 0 9 88.0 80 28 5 24 49 Jonathan O'Brien 2009-2009 0 0 .000 4.91 3 0 0 0 1 3.2 5 2 0 1 2 Morton O'Brien 1993-1993 0 0 .000 0.00 2 0 0 0 0 3.1 1 0 0 1 3 Ronald O'Bryan 2011-2018 4 3 .571 2.93 32 0 0 0 1 46.0 54 15 2 12 30 Larry O'Colgan 1990-1990 2 1 .667 0.90 12 0 0 0 0 20.0 23 2 0 10 12 Oscar O'Connor 1996-1996 1 3 .250 8.20 24 0 0 0 1 26.1 44 24 2 8 16 Johnny O'Creagh 2025-2025 4 6 .400 4.17 52 0 0 0 27 49.2 52 23 4 24 38 Jacob O'Day 2002-2011 7 5 .583 2.25 70 0 0 0 9 104.0 74 26 2 40 79 Bill O'Dell 2007-2007 1 1 .500 4.70 9 0 0 0 1 7.2 7 4 1 3 4 Andre O'Grotty 2008-2008 2 0 1.000 0.00 2 2 1 1 0 16.0 4 0 0 2 12 Jimmy O'Halloran 2016-2016 1 0 1.000 0.60 2 2 0 0 0 15.0 10 1 0 3 17 Ed O'Herlihy 2001-2001 7 6 .538 3.06 13 13 3 0 0 100.0 86 34 3 30 54 Todd O'Herlihy 2025-2025 1 1 .500 3.16 31 0 0 0 0 42.2 38 15 2 22 41 Samuel O'Keefe 2014-2015 6 4 .600 2.37 46 10 0 0 2 110.0 92 29 2 23 76 Curt O'Mullen 2019-2019 9 5 .643 1.90 18 18 4 2 0 137.2 86 29 3 33 142 Jude O'Neal 2018-2018 1 1 .500 0.00 2 2 1 0 0 16.0 5 0 0 4 13 Kevin O'Neal 2023-2024 7 14 .333 3.17 27 27 0 0 0 167.2 147 59 8 33 113 Mark O'Neil 1994-1995 4 6 .400 4.88 14 14 2 1 0 86.2 100 47 6 23 9 Paul O'Neil 2012-2013 2 0 1.000 0.60 20 1 0 0 5 45.1 29 3 1 8 24 Joel O'Quinn 2014-2014 1 1 .500 1.85 20 0 0 0 3 24.1 20 5 1 7 12 Joe O'Reilly 1995-1997 1 0 1.000 3.82 16 0 0 0 1 33.0 37 14 2 9 9 Guy O'Sullivan 1994-1996 2 2 .500 2.51 24 0 0 0 3 32.1 38 9 2 6 11 Ken O'Toole 1999-2000 8 6 .571 2.99 22 22 1 0 0 144.1 141 48 4 49 87 António Ocampo 2025-2025 12 3 .800 2.16 25 25 0 0 0 167.0 133 40 4 31 126 Arturo Ocasio 2015-2016 5 0 1.000 1.87 33 0 0 0 5 43.1 27 9 2 18 34 Jorge Ochoa 2016-2016 13 4 .765 2.36 24 19 2 2 0 145.0 93 38 8 20 89 Curt Odom 1990-1990 0 0 .000 0.00 1 0 0 0 0 2.1 2 0 0 0 1 Player From-To W L Pct ERA G GS CG SHO SV IP H ER HR BB SO Suezo Ogawa 2021-2024 5 5 .500 3.25 74 10 0 0 13 110.2 85 40 3 25 45 Andy Oglethorpe 2017-2017 1 0 1.000 0.45 15 0 0 0 0 20.0 10 1 0 9 22 Brian Oglethorpe 1997-1997 5 4 .556 5.65 13 13 0 0 0 79.2 101 50 9 33 20 Kumanosuke Ohara 2025-2025 0 0 .000 0.00 1 0 0 0 0 0.1 0 0 0 0 0 Sumitomo Ohayashi 2021-2022 0 0 .000 0.89 16 0 0 0 0 20.1 18 2 2 3 8 Sumitomo Ohba 2022-2022 4 0 1.000 0.70 45 0 0 0 3 51.1 14 4 2 4 75 Kazuhiro Oike 2022-2022 4 3 .571 1.22 43 0 0 0 32 44.1 42 6 1 10 30 Sami Ojo 2019-2019 2 1 .667 0.45 32 0 0 0 0 40.0 21 2 2 13 52 Takaaki Oka 2016-2020 0 1 .000 2.16 9 0 0 0 1 16.2 13 4 1 2 14 Ken Okabe 1990-1990 2 4 .333 4.82 17 0 0 0 0 28.0 36 15 2 12 17 Shoichi Okazaki 2024-2025 4 0 1.000 3.22 63 0 0 0 2 67.0 66 24 4 37 66 Xavier Oliva 2009-2012 55 32 .632 2.65 110 110 15 6 0 792.0 659 233 25 132 716 Al Oliver 2014-2014 7 12 .368 4.63 24 24 3 1 0 153.2 175 79 5 33 72 Phil Oliver 2023-2023 0 2 .000 4.96 38 0 0 0 0 45.1 48 25 3 18 43 Willie Olsen 2014-2025 3 0 1.000 1.00 27 0 0 0 4 27.0 20 3 1 7 20 David Olvera 2019-2019 15 5 .750 3.01 25 25 0 0 0 164.2 151 55 8 48 92 Jaime Olvera 2020-2021 17 12 .586 2.80 43 43 3 2 0 286.0 258 89 10 65 308 Lúcio Olvera 2016-2017 13 9 .591 4.30 38 38 1 1 0 205.1 202 98 25 92 130 Rubén Ontiveros 2021-2024 27 18 .600 2.82 110 49 3 1 5 412.0 387 129 19 126 351 Pedro Ordóńez 2025-2025 5 3 .625 2.03 10 10 2 1 0 75.1 53 17 4 13 48 Carlos Oroz 1993-1993 1 0 1.000 1.13 3 0 0 0 0 8.0 8 1 0 1 7 Jesús Orozco 2015-2015 12 7 .632 2.12 24 24 3 3 0 170.0 125 40 3 45 77 Gerardo Ortega 1991-1991 0 1 .000 2.91 22 0 0 0 16 21.2 17 7 0 8 9 José Ortega 2009-2016 14 18 .438 3.55 56 45 3 0 2 317.1 363 125 16 68 107 Norberto Ortega 2017-2024 4 3 .571 3.15 74 0 0 0 6 80.0 57 28 6 34 90 Pancho Ortega 1990-1994 18 15 .545 3.64 52 49 3 0 0 324.1 361 131 8 77 159 Ramiro Ortegón 1990-1993 1 1 .500 2.00 14 4 0 0 1 45.0 46 10 2 8 22 Alberto Ortíz 2008-2011 14 14 .500 2.00 36 34 10 3 0 256.2 205 57 7 30 117 Jorge Ortíz 2017-2021 14 19 .424 3.74 94 46 0 0 4 317.1 279 132 27 139 170 José Ortíz 1993-1993 0 0 .000 1.08 4 0 0 0 0 8.1 5 1 0 1 1 Player From-To W L Pct ERA G GS CG SHO SV IP H ER HR BB SO Sergio Ortíz 2021-2025 1 1 .500 5.09 23 0 0 0 2 23.0 22 13 3 10 19 Chuck Osborn 1993-2004 1 0 1.000 3.69 17 0 0 0 2 31.2 35 13 2 7 27 Edmund Osborn 1990-1990 1 0 1.000 2.33 4 4 0 0 0 27.0 21 7 1 8 28 Frank Osborne 2014-2015 17 13 .567 2.57 39 34 4 1 0 255.2 214 73 10 25 116 Masakado Ota 2015-2016 10 4 .714 2.88 60 0 0 0 19 68.2 69 22 4 26 31 Razan Ota 2023-2024 0 1 .000 4.50 8 0 0 0 0 16.0 16 8 1 6 12 Shusaku Ota 2024-2025 6 4 .600 3.08 89 0 0 0 5 108.0 118 37 6 26 57 Octávio Otero 2003-2006 5 1 .833 2.82 48 0 0 0 4 67.0 73 21 3 33 34 Paco Otero 2015-2015 2 4 .333 3.64 37 0 0 0 15 42.0 34 17 4 10 41 Les Overdevest 2017-2017 0 0 .000 0.00 1 0 0 0 0 1.1 1 0 0 0 2 Guo Ow-Yang 1992-1993 1 8 .111 6.21 22 14 1 0 0 71.0 102 49 3 29 22 Bob Owens 2023-2023 6 4 .600 2.96 11 11 0 0 0 76.0 73 25 1 15 56 Gyoo-jae O 2013-2013 5 6 .455 3.06 16 16 1 1 0 114.2 108 39 1 24 43 Charles Owens 2024-2025 1 0 1.000 3.60 17 0 0 0 0 15.0 16 6 1 3 17 Seong-ryong O 2021-2021 4 1 .800 2.03 12 12 0 0 0 79.2 67 18 3 19 43 75 Players

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