Baseball Players with Last Names Starting with O

Index of Letters

350 Players

  • Bold indicates active player and + indicates a Hall of Famer.

Mike O'Berry (1979-1985)

Billy O'Brien (1884-1890)

Bob O'Brien (1971-1971)

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 (1923-1923)

Eddie O'Brien (1953-1958)

George O'Brien (1915-1915)

Jack O'Brien (1882-1890)

Jack O'Brien (1899-1903)

John O'Brien (1884-1884)

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 (2015-2016)

Ray O'Brien (1916-1916)

Syd O'Brien (1969-1972)

Tom O'Brien (1882-1890)

Tom O'Brien (1897-1900)

Tommy O'Brien (1943-1950)

Danny O'Connell (1950-1962)

Jimmy O'Connell (1923-1924)

John O'Connell (1891-1902)

John O'Connell (1928-1929)

Pat O'Connell (1886-1886)

Andy O'Connor (1908-1908)

Brian O'Connor (2000-2000)

Dan O'Connor (1890-1890)

Frank O'Connor (1893-1893)

Jack O'Connor (1887-1910)

Jack O'Connor (1981-1987)

Johnny O'Connor (1916-1916)

Mike O'Connor (2006-2011)

Paddy O'Connor (1908-1918)

Darren O'Day (2008-2017)

Hank O'Day+ (1884-1890)

Ken O'Dea (1935-1946)

Paul O'Dea (1944-1945)

Billy O'Dell (1954-1967)

George O'Donnell (1954-1954)

Harry O'Donnell (1927-1927)

John O'Donnell (1884-1884)

John O'Donoghue (1963-1971)

John O'Donoghue (1993-1993)

Lefty O'Doul (1919-1934)

Bob O'Farrell (1915-1935)

Eric O'Flaherty (2006-2017)

Hal O'Hagan (1892-1902)

Greg O'Halloran (1994-1994)

Bill O'Hara (1909-1910)

Kid O'Hara (1904-1904)

Tom O'Hara (1906-1907)

Charley O'Leary (1904-1934)

Dan O'Leary (1879-1884)

Troy O'Leary (1993-2003)

Patrick O'Loughlin (1883-1883)

Ryan O'Malley (2006-2006)

Shawn O'Malley (2014-2016)

Tom O'Malley (1982-1990)

Ollie O'Mara (1912-1919)

Eddie O'Meara (1895-1896)

Randy O'Neal (1984-1990)

Skinny O'Neal (1925-1927)

Ed O'Neil (1890-1890)

Fancy O'Neil (1874-1874)

Hugh O'Neil (1875-1875)

John O'Neil (1946-1946)

Mickey O'Neil (1919-1927)

Bill O'Neill (1904-1906)

Dennis O'Neill (1893-1893)

Emmett O'Neill (1943-1946)

Fred O'Neill (1887-1887)

Harry O'Neill (1922-1923)

Harry O'Neill (1939-1939)

Jack O'Neill (1902-1906)

Jim O'Neill (1920-1923)

John O'Neill (1899-1902)

Mike O'Neill (1901-1907)

Paul O'Neill (1985-2001)

Peaches O'Neill (1904-1904)

Steve O'Neill (1911-1928)

Tip O'Neill (1883-1892)

Don O'Riley (1969-1970)

O'Rourke (1872-1872)

Frank O'Rourke (1912-1931)

Jim O'Rourke+ (1872-1904)

Jim O'Rourke (1959-1959)

Joe O'Rourke (1929-1929)

John O'Rourke (1879-1883)

Mike O'Rourke (1890-1890)

Patsy O'Rourke (1908-1908)

Queenie O'Rourke (1908-1908)

Ryan O'Rourke (2015-2016)

Tim O'Rourke (1890-1894)

Tom O'Rourke (1887-1890)

Sean O'Sullivan (2009-2016)

Denny O'Toole (1969-1973)

Jim O'Toole (1958-1967)

Marty O'Toole (1908-1914)

Rebel Oakes (1909-1915)

Prince Oana (1934-1945)

Johnny Oates (1970-1981)

Sherman Obando (1993-1997)

Henry Oberbeck (1883-1884)

Scott Oberg (2015-2017)

Brett Oberholtzer (2013-2016)

Ken Oberkfell (1977-1992)

Doc Oberlander (1888-1888)

Frank Oberlin (1906-1910)

Wes Obermueller (2002-2007)

Jim Obradovich (1978-1978)

Alex Ochoa (1995-2002)

Ivan Ochoa (2008-2008)

Whitey Ock (1935-1935)

Walter Ockey (1944-1944)

Ted Odenwald (1921-1922)

Blue Moon Odom (1964-1976)

Dave Odom (1943-1943)

Heinie Odom (1925-1925)

Rougned Odor (2014-2017)

Jake Odorizzi (2012-2017)

Fred Odwell (1904-1907)

Bryan Oelkers (1983-1986)

Trent Oeltjen (2009-2011)

Chuck Oertel (1958-1958)

Joe Oeschger (1914-1925)

Ron Oester (1978-1990)

Jose Offerman (1990-2005)

Rowland Office (1972-1983)

Alexi Ogando (2010-2016)

Nefi Ogando (2015-2016)

Curly Ogden (1922-1926)

Jack Ogden (1918-1932)

Chad Ogea (1994-1999)

Jim Oglesby (1936-1936)

Ben Oglivie (1971-1986)

Bruce Ogrodowski (1936-1937)

Joe Ogrodowski (1925-1925)

Seung-hwan Oh (2016-2017)

Tomo Ohka (1999-2009)

Joe Ohl (1909-1909)

Ross Ohlendorf (2007-2016)

Will Ohman (2000-2012)

Kevin Ohme (2003-2003)

Kirt Ojala (1997-1999)

Augie Ojeda (2000-2010)

Bob Ojeda (1980-1994)

Miguel Ojeda (2003-2006)

Hideki Okajima (2007-2013)

Steven Okert (2016-2017)

Frank Okrie (1920-1920)

Len Okrie (1948-1952)

Jim Olander (1991-1991)

Dave Oldfield (1883-1886)

John Oldham (1956-1956)

Red Oldham (1914-1926)

Bob Oldis (1953-1963)

Rube Oldring (1905-1918)

John Olerud (1989-2005)

Frank Olin (1884-1885)

Steve Olin (1989-1992)

Jose Oliva (1994-1995)

Tony Oliva (1962-1976)

Ed Olivares (1960-1961)

Omar Olivares (1990-2001)

Al Oliver (1968-1985)

Andy Oliver (2010-2011)

Bob Oliver (1965-1975)

Darren Oliver (1993-2013)

Dave Oliver (1977-1977)

Gene Oliver (1959-1969)

Joe Oliver (1989-2001)

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)

Jim Ollom (1966-1967)

Ray Olmedo (2003-2012)

Luis Olmo (1943-1951)

Edgar Olmos (2013-2015)

Fred Olmstead (1908-1911)

Al Olmsted (1980-1980)

Hank Olmsted (1905-1905)

Barney Olsen (1941-1941)

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 (2016-2016)

Ted Olson (1936-1938)

Tim Olson (2004-2005)

Tyler Olson (2015-2016)

Mike Olt (2012-2015)

Ed Olwine (1986-1988)

Brian Omogrosso (2012-2013)

Logan Ondrusek (2010-2016)

Ralph Onis (1935-1935)

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 (1875-1875)

Ernie Oravetz (1955-1956)

Luis Ordaz (1997-2006)

Tony Ordenana (1943-1943)

Magglio Ordonez (1997-2011)

Rey Ordonez (1996-2004)

Joe Orengo (1939-1945)

Kevin Orie (1997-2002)

Paulo Orlando (2015-2017)

George Orme (1920-1920)

Jess Orndorff (1907-1907)

Eddie Oropesa (2001-2004)

Jesse Orosco (1979-2003)

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)

Jorge Orta (1972-1987)

Anthony Ortega (2009-2009)

Bill Ortega (2001-2001)

Jose Ortega (2012-2014)

Phil Ortega (1960-1969)

Rafael Ortega (2012-2016)

Frank Ortenzio (1973-1973)

Al Orth (1895-1909)

Baby Ortiz (1944-1944)

David Ortiz (1997-2016)

Hector Ortiz (1998-2002)

Javier Ortiz (1990-1991)

Joe Ortiz (2013-2013)

Jose Ortiz (1969-1971)

Jose Ortiz (2000-2002)

Junior Ortiz (1982-1994)

Luis Ortiz (1993-1996)

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)

Bob Osborn (1925-1931)

Fred Osborn (1907-1909)

Ozzie Osborn (1975-1975)

Bobo Osborne (1957-1963)

Donovan Osborne (1992-2004)

Fred Osborne (1890-1890)

Tiny Osborne (1922-1925)

Wayne Osborne (1935-1936)

Pat Osburn (1974-1975)

Charlie Osgood (1944-1944)

Josh Osich (2015-2016)

Keith Osik (1996-2005)

Dan Osinski (1962-1970)

Franquelis Osoria (2005-2008)

Harry Ostdiek (1904-1908)

Champ Osteen (1903-1909)

Claude Osteen (1957-1975)

Darrell Osteen (1965-1970)

Fred Ostendorf (1914-1914)

Bill Oster (1954-1954)

Red Ostergard (1921-1921)

Charlie Osterhout (1879-1879)

Fritz Ostermueller (1934-1948)

Jimmy Osting (2001-2002)

Brian Ostrosser (1973-1973)

Joe Ostrowski (1948-1952)

Johnny Ostrowski (1943-1950)

Al Osuna (1990-1996)

Antonio Osuna (1995-2005)

Jose Osuna (2017-2017)

Roberto Osuna (2015-2017)

Roy Oswalt (2001-2013)

Willis Otanez (1998-1999)

Dan Otero (2012-2017)

Reggie Otero (1945-1945)

Ricky Otero (1995-1997)

Bill Otey (1907-1911)

Amos Otis (1967-1984)

Bill Otis (1912-1912)

Harry Otis (1909-1909)

Akinori Otsuka (2004-2007)

Billy Ott (1962-1964)

Ed Ott (1974-1981)

Mel Ott+ (1926-1947)

Adam Ottavino (2010-2017)

Jim Otten (1974-1981)

Joe Otten (1895-1895)

Billy Otterson (1887-1887)

Dave Otto (1987-1994)

Phil Ouellette (1986-1986)

Johnny Oulliber (1933-1933)

Chink Outen (1933-1933)

Jimmy Outlaw (1937-1949)

Josh Outman (2008-2014)

Orval Overall (1905-1913)

Lyle Overbay (2001-2014)

Stubby Overmire (1943-1952)

Dillon Overton (2016-2017)

Mike Overy (1976-1976)

Juan Carlos Oviedo (2005-2014)

Ernie Ovitz (1911-1911)

Bob Owchinko (1976-1986)

Dave Owen (1983-1988)

Frank Owen (1901-1909)

Larry Owen (1981-1988)

Marv Owen (1931-1940)

Mickey Owen (1937-1954)

Spike Owen (1983-1995)

Eric Owens (1995-2003)

Henry Owens (2006-2007)

Henry Owens (2015-2016)

Jack Owens (1935-1935)

Jayhawk Owens (1993-1996)

Jerry Owens (2006-2009)

Jim Owens (1955-1967)

Red Owens (1899-1905)

Rudy Owens (2014-2014)

Yip Owens (1905-1915)

Chris Owings (2013-2017)

Micah Owings (2007-2012)

Rick Ownbey (1982-1986)

Henry Oxley (1884-1884)

Chris Oxspring (2005-2005)

Andy Oyler (1902-1902)

Ray Oyler (1965-1970)

Doc Ozmer (1923-1923)

Marcell Ozuna (2013-2017)

Pablo Ozuna (2000-2008)

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