Historical Baseball Player Directory

Rebel Oakes 1909-1915 Charles Oakley 1940 Trevor Oaks 2018 Prince Oana 1934-1945 Johnny Oates 1970-1981 Sherman Obando 1993-1997 Bailey Ober 2021-2025 Henry Oberbeck 1883-1884 Scott Oberg 2015-2019 Brett Oberholtzer 2013-2016 Ken Oberkfell 1977-1992 Doc Oberlander 1888 Frank Oberlin 1906-1910 Wes Obermueller 2002-2007 Mike O'Berry 1979-1985 Jim Obradovich 1978 Billy O'Brien 1884-1890 Bob O'Brien 1971 Buck O'Brien 1911-1913 Charlie O'Brien 1985-2000 Cinders O'Brien 1888-1891 Dan O'Brien 1978-1979 Darby O'Brien 1887-1892 Dink O'Brien 1923 Eddie O'Brien 1953-1958 George O'Brien 1915 Jack O'Brien 1882-1890 Jack O'Brien 1899-1903 John O'Brien 1884 John O'Brien 1891-1899 Johnny O'Brien 1953-1959 Pete O'Brien 1887-1890 Pete O'Brien 1901-1907 Pete O'Brien 1982-1993 Peter O'Brien 2015-2019 Ray O'Brien 1916 Riley O'Brien 2021-2025 Syd O'Brien 1969-1972 Tom O'Brien 1882-1890 Tom O'Brien 1897-1900 Tommy O'Brien 1943-1950 Willie O'Bryant 1932 Alex Ochoa 1995-2002 Ivan Ochoa 2008 Whitey Ock 1935 Walter Ockey 1944 Danny O'Connell 1950-1962 Jimmy O'Connell 1923-1924 John O'Connell 1891-1902 John O'Connell 1928-1929 Pat O'Connell 1886 Andy O'Connor 1908 Brian O'Connor 2000 Dan O'Connor 1890 Frank O'Connor 1893 Jack O'Connor 1887-1910 Jack O'Connor 1981-1987 Johnny O'Connor 1916 Mike O'Connor 2006-2011 Paddy O'Connor 1908-1918 Darren O'Day 2008-2022 Hank O'Day 1884-1890 Ken O'Dea 1935-1946 Paul O'Dea 1944-1945 Billy O'Dell 1954-1967 Johnnie Oden 1927-1932 Ted Odenwald 1921-1922 Blue Moon Odom 1964-1976 Dave Odom 1943 Heinie Odom 1925 Joseph Odom 2020-2021 Sam Odom 1946 George O'Donnell 1954 Harry O'Donnell 1927 John O'Donnell 1884 John O'Donoghue 1963-1971 John O'Donoghue 1993 Rougned Odor 2014-2023 Jake Odorizzi 2012-2022 Lefty O'Doul 1919-1934 Fred Odwell 1904-1907 Bryan Oelkers 1983-1986 Trent Oeltjen 2009-2011 Chuck Oertel 1958 Joe Oeschger 1914-1925 Ron Oester 1978-1990 Bob O'Farrell 1915-1935 Jose Offerman 1990-2005 Rowland Office 1972-1983 Mose Offutt 1925 Eric O'Flaherty 2006-2017 Alexi Ogando 2010-2018 Cristofer Ogando 2022 Nefi Ogando 2015-2016 Shinnosuke Ogasawara 2025 Curly Ogden 1922-1926 Jack Ogden 1918-1932 Chad Ogea 1994-1999 Jim Oglesby 1936 Ben Oglivie 1971-1986 Brian O'Grady 2019-2021 Chris O'Grady 2017-2018 Bruce Ogrodowski 1936-1937 Joe Ogrodowski 1925 Seunghwan Oh 2016-2019 Hal O'Hagan 1892-1902 Greg O'Halloran 1994 Bill O'Hara 1909-1910 Kid O'Hara 1904 Tom O'Hara 1906-1907 Ryan O'Hearn 2018-2025 Tomo Ohka 1999-2009 Joe Ohl 1909 Pierson Ohl 2025 Ross Ohlendorf 2007-2016 Mike Ohlman 2017 Will Ohman 2000-2012 Kevin Ohme 2003 Logan O'Hoppe 2022-2025 Shohei Ohtani 2018-2025 Kirt Ojala 1997-1999 Augie Ojeda 2000-2010 Bob Ojeda 1980-1994 Miguel Ojeda 2003-2006 Hideki Okajima 2007-2013 Brian O'Keefe 2022-2023 O'Keefe 1922 Steven Okert 2016-2025 Chris Okey 2022-2023 Frank Okrie 1920 Len Okrie 1948-1952 Jim Olander 1991 Pedro Olave 1906 Dave Oldfield 1883-1886 Jimmy Oldham 1920-1923 John Oldham 1956 Red Oldham 1914-1926 Bob Oldis 1953-1963 Rube Oldring 1905-1918 Charley O'Leary 1904-1934 Dan O'Leary 1879-1884 Troy O'Leary 1993-2003 John Olerud 1989-2005 Frank Olin 1884-1885 Steve Olin 1989-1992 Jared Oliva 2020-2021 Jose Oliva 1994-1995 Tony Oliva 1962-1976 Ed Olivares 1960-1961 Edward Olivares 2020-2024 Omar Olivares 1990-2001 Al Oliver 1968-1985 Andy Oliver 2010-2011 Bob Oliver 1965-1975 Darren Oliver 1993-2013 Dave Oliver 1977 Gene Oliver 1959-1969 Jim Oliver 1946 Joe Oliver 1989-2001 John Henry Oliver 1930-1945 Nate Oliver 1963-1969 Tom Oliver 1930-1933 Hector Olivera 2015-2016 Francisco Oliveras 1989-1992 Lester Oliveros 2011-2014 Chi-Chi Olivo 1961-1966 Diomedes Olivo 1960-1963 Miguel Olivo 2002-2014 Adam Oller 2022-2024 Jim Ollom 1966-1967 Ray Olmedo 2003-2012 Luis Olmo 1943-1951 Edgar Olmos 2013-2015 Fred Olmstead 1908-1911 Al Olmsted 1980 Hank Olmsted 1905 Jack O'Loughlin 2024 Patrick O'Loughlin 1883 Barney Olsen 1941 Kevin Olsen 2001-2003 Ole Olsen 1922-1923 Scott Olsen 2005-2010 Vern Olsen 1939-1946 Garrett Olson 2007-2012 Greg Olson 1989-1993 Gregg Olson 1988-2001 Ivy Olson 1911-1924 Karl Olson 1951-1957 Marv Olson 1931-1933 Matt Olson 2016-2025 Reese Olson 2023-2025 Ted Olson 1936-1938 Tim Olson 2004-2005 Tyler Olson 2015-2019 Mike Olt 2012-2015 Ed Olwine 1986-1988 Ryan O'Malley 2006 Shawn O'Malley 2014-2016 Tom O'Malley 1982-1990 Ollie O'Mara 1912-1919 Omeada 1932 Eddie O'Meara 1895-1896 Brian Omogrosso 2012-2013 Alejandro Oms 1917-1935 Jorge Ona 2020 Logan Ondrusek 2010-2016 Luther O'Neal 1910-1914 Oran O'Neal 1925-1927 Randy O'Neal 1984-1990 Buck O'Neil 1937-1948 Charles O'Neil 1921-1923 Ed O'Neil 1890 Fancy O'Neil 1874 John O'Neil 1899-1902 John O'Neil 1946 Mickey O'Neil 1919-1927 Dennis O'Neill 1893 Emmett O'Neill 1943-1946 Fred O'Neill 1887 Harry O'Neill 1922-1923 Harry O'Neill 1939 Hugh O'Neill 1875 Jack O'Neill 1902-1906 Jim O'Neill 1920-1923 John O'Neill 1904-1906 Mike O'Neill 1901-1907 Paul O'Neill 1985-2001 Peaches O'Neill 1904 Steve O'Neill 1911-1928 Tip O'Neill 1883-1892 Tyler O'Neill 2018-2025 Manuel Onis 1935 Eddie Onslow 1912-1927 Jack Onslow 1912-1917 Steve Ontiveros 1973-1980 Steve Ontiveros 1985-2000 Jose Oquendo 1983-1995 Mike Oquist 1993-1999 Tom Oran 1875 Grady Orange 1925-1931 Orange 1928 Ernie Oravetz 1955-1956 Luis Ordaz 1997-2006 Tony Ordenana 1943 Magglio Ordonez 1997-2011 Rey Ordonez 1996-2004 Joe Orengo 1939-1945 Nate Orf 2018-2020 Kevin Orie 1997-2002 Don O'Riley 1969-1970 Paulo Orlando 2015-2018 Clarence Orme 1920 George Orme 1920 Jess Orndorff 1907 Jonathan Ornelas 2023-2025 Tirso Ornelas 2025 Eddie Oropesa 2001-2004 Jesse Orosco 1979-2003 Frank O'Rourke 1912-1931 Jim O'Rourke 1959 Jim O'Rourke 1872-1904 Jimmy O'Rourke 1908 Joe O'Rourke 1929 John O'Rourke 1879-1883 Mike O'Rourke 1890 Patsy O'Rourke 1908 Ryan O'Rourke 2015-2019 Tim O'Rourke 1890-1894 Tom O'Rourke 1887-1890 O'Rourke 1872 Billy Orr 1913-1914 Dave Orr 1883-1890 Pete Orr 2005-2013 Joe Orrell 1943-1945 Ernie Orsatti 1927-1935 John Orsino 1961-1967 Joe Orsulak 1983-1997 Kaleb Ort 2021-2025 Jorge Orta 1972-1987 Anthony Ortega 2009 Bill Ortega 2001 Jose Ortega 2012-2014 Oliver Ortega 2021-2023 Phil Ortega 1960-1969 Rafael Ortega 2012-2024 Frank Ortenzio 1973 Al Orth 1895-1909 Danny Ortiz 2017 David Ortiz 1997-2016 Hector Ortiz 1998-2002 Javier Ortiz 1990-1991 Joe Ortiz 2013 Joey Ortiz 2023-2025 Jose Ortiz 1969-1971 Jose Ortiz 2000-2002 Junior Ortiz 1982-1994 Luis Ortiz 1993-1996 Luis Ortiz 2018-2024 Luis Ortiz 2022-2025 Oliverio Ortiz 1944 Rafaelito Ortiz 1948 Ramon Ortiz 1999-2013 Roberto Ortiz 1941-1950 Russ Ortiz 1998-2010 Daniel Ortmeier 2005-2008 John Orton 1989-1993 Chad Orvella 2005-2007 Ossie Orwoll 1928-1929 Eric Orze 2024-2025 Bob Osborn 1925-1931 Fred Osborn 1907-1909 Ozzie Osborn 1975 Bobo Osborne 1957-1963 Donovan Osborne 1992-2004 Fred Osborne 1890 Tiny Osborne 1922-1925 Wayne Osborne 1935-1936 Pat Osburn 1974-1975 Charlie Osgood 1944 Josh Osich 2015-2021 Keith Osik 1996-2005 Dan Osinski 1962-1970 Julius Osley 1937-1938 Franquelis Osoria 2005-2008 Harry Ostdiek 1904-1908 Champ Osteen 1903-1909 Claude Osteen 1957-1975 Darrell Osteen 1965-1970 Fred Ostendorf 1914 Bill Oster 1954 Red Ostergard 1921 Charlie Osterhout 1879 Fritz Ostermueller 1934-1948 Jimmy Osting 2001-2002 Brian Ostrosser 1973 Joe Ostrowski 1948-1952 Johnny Ostrowski 1943-1950 Sean O'Sullivan 2009-2016 Al Osuna 1990-1996 Alejandro Osuna 2025 Antonio Osuna 1995-2005 Jose Osuna 2017-2020 Roberto Osuna 2015-2020 Corey Oswalt 2018-2021 Roy Oswalt 2001-2013 Willis Otanez 1998-1999 Michel Otañez 2024-2025 Dan Otero 2012-2019 Reggie Otero 1945 Ricky Otero 1995-1997 Bill Otey 1907-1911 Amos Otis 1967-1984 Bill Otis 1912 Harry Otis 1909 Denny O'Toole 1969-1973 Jim O'Toole 1958-1967 Marty O'Toole 1908-1914 Akinori Otsuka 2004-2007 Billy Ott 1962-1964 Ed Ott 1974-1981 Mel Ott 1926-1947 Adam Ottavino 2010-2025 Jim Otten 1974-1981 John Otten 1895 Billy Otterson 1887 Dave Otto 1987-1994 Glenn Otto 2021-2023 Phil Ouellette 1986 Johnny Oulliber 1933 Guy Ousley 1931-1932 Bill Outen 1933 Jimmy Outlaw 1937-1949 James Outman 2022-2025 Josh Outman 2008-2014 Orval Overall 1905-1913 Lyle Overbay 2001-2014 Stubby Overmire 1943-1952 Albert Overton 1932-1944 Connor Overton 2021-2023 Dillon Overton 2016-2017 Mike Overy 1976 Johan Oviedo 2020-2025 Juan Carlos Oviedo 2005-2014 Luis Oviedo 2021 Ernie Ovitz 1911 Bob Owchinko 1976-1986 Dave Owen 1983-1988 Frank Owen 1901-1909 Hunter Owen 2021 Larry Owen 1981-1988 Marv Owen 1931-1940 Mickey Owen 1937-1954 Spike Owen 1983-1995 Albert Owens 1930 Aubrey Owens 1922-1925 Dewitt Owens 1926-1930 Eric Owens 1995-2003 Henry Owens 2006-2007 Henry Owens 2015-2016 Jack Owens 1935 Jayhawk Owens 1993-1996 Jerry Owens 2006-2009 Jim Owens 1955-1967 Judge Owens 1943 Oscar Owens 1922-1931 Red Owens 1899-1905 Roosevelt Owens 1934-1937 Rudy Owens 2014 Smoky Owens 1938-1942 Sylvester Owens 1937-1942 Tyler Owens 2025 Will Owens 1924-1933 Yip Owens 1905-1915 Chris Owings 2013-2023 Micah Owings 2007-2012 Rick Ownbey 1982-1986 Henry Oxley 1884 Chris Oxspring 2005 Andy Oyler 1902 Ray Oyler 1965-1970 Horace Ozmer 1923 Marcell Ozuna 2013-2025 Pablo Ozuna 2000-2008