Baseball Player Autographs (Letter O)

Baseball Almanac is pleased to present a list of EVERY Major League player with a last name that starts with an 'O' on our site whose player page includes an autographed baseball card. Included on the chart are links to the players biography, the years he played, and a (HOF) Hall of Fame mark (Y=Yes). Bold entries stand for active players which are defined as those who played in at least one Major League game during the most recently completed season.

"The fun-loving brothers (Johnny & Eddie O'Brien) derived great pleasure from confusing managers, and the Topps baseball card company, as to who was who; Topps solved the problem one year by putting both of them on one card." - Author Ellery Clark on BaseballLibrary.com

Baseball Player Autographs

A Classic Collection (Letter O)

Mike O'Berry Autograph 1979 - 1985
Bob O'Brien Autograph 1971 - 1971
Charlie O'Brien Autograph 1985 - 2000
Dan O'Brien Autograph 1978 - 1979
Eddie O'Brien Autograph 1953 - 1958
Johnny O'Brien Autograph 1953 - 1959
Pete O'Brien Autograph 1982 - 1993
Syd O'Brien Autograph 1969 - 1972
Brian O'Connor Autograph 2000 - 2000
Jack O'Connor Autograph 1981 - 1987
Mike O'Connor Autograph 2006 - 2011
Billy O'Dell Autograph 1954 - 1967
John O'Donoghue Autograph 1963 - 1971
John O'Donoghue Autograph 1993 - 1993
Lefty O'Doul Autograph 1919 - 1934
Bob O'Farrell Autograph 1915 - 1935
Eric O'Flaherty Autograph 2006 - 2017
Greg O'Halloran Autograph 1994 - 1994
Troy O'Leary Autograph 1993 - 2003
Ryan O'Malley Autograph 2006 - 2006
Shawn O'Malley Autograph 2014 - 2016
Tom O'Malley Autograph 1982 - 1990
Randy O'Neal Autograph 1984 - 1990
Emmett O'Neill Autograph 1943 - 1946
Paul O'Neill Autograph 1985 - 2001
Jim O'Toole Autograph 1958 - 1967
Johnny Oates Autograph 1970 - 1981
Sherman Obando Autograph 1993 - 1997
Brett Oberholtzer Autograph 2013 - 2016
Ken Oberkfell Autograph 1977 - 1992
Wes Obermueller Autograph 2002 - 2007
Jim Obradovich Autograph 1978 - 1978
Alex Ochoa Autograph 1995 - 2002
Ivan Ochoa Autograph 2008 - 2008
Blue Moon Odom Autograph 1964 - 1976
Rougned Odor Autograph 2014 - 2019
Jake Odorizzi Autograph 2012 - 2019
Bryan Oelkers Autograph 1983 - 1986
Trent Oeltjen Autograph 2009 - 2011
Joe Oeschger Autograph 1914 - 1925
Ron Oester Autograph 1978 - 1990
Jose Offerman Autograph 1990 - 2005
Rowland Office Autograph 1972 - 1983
Alexi Ogando Autograph 2010 - 2018
Chad Ogea Autograph 1994 - 1999
Ben Oglivie Autograph 1971 - 1986
Tomo Ohka Autograph 1999 - 2009
Ross Ohlendorf Autograph 2007 - 2016
Mike Ohlman Autograph 2017 - 2017
Will Ohman Autograph 2000 - 2012
Kevin Ohme Autograph 2003 - 2003
Augie Ojeda Autograph 2000 - 2010
Bob Ojeda Autograph 1980 - 1994
Hideki Okajima Autograph 2007 - 2013
Len Okrie Autograph 1948 - 1952
Jim Olander Autograph 1991 - 1991
Bob Oldis Autograph 1953 - 1963
John Olerud Autograph 1989 - 2005
Steve Olin Autograph 1989 - 1992
Jose Oliva Autograph 1994 - 1995
Tony Oliva Autograph 1962 - 1976
Ed Olivares Autograph 1960 - 1961
Omar Olivares Autograph 1990 - 2001
Al Oliver Autograph 1968 - 1985
Andrew Oliver Autograph 2010 - 2011
Bob Oliver Autograph 1965 - 1975
Darren Oliver Autograph 1993 - 2013
Dave Oliver Autograph 1977 - 1977
Gene Oliver Autograph 1959 - 1969
Joe Oliver Autograph 1989 - 2001
Nate Oliver Autograph 1963 - 1969
Hector Olivera Autograph 2015 - 2016
Francisco Oliveras Autograph 1989 - 1992
Lester Oliveros Autograph 2011 - 2014
Miguel Olivo Autograph 2002 - 2014
Jim Ollom Autograph 1966 - 1967
Ray Olmedo Autograph 2003 - 2012
Luis Olmo Autograph 1943 - 1951
Edgar Olmos Autograph 2013 - 2015
Al Olmsted Autograph 1980 - 1980
Kevin Olsen Autograph 2001 - 2003
Scott Olsen Autograph 2005 - 2010
Vern Olsen Autograph 1939 - 1946
Garrett Olson Autograph 2007 - 2012
Greg Olson Autograph 1989 - 1993
Gregg Olson Autograph 1988 - 2001
Karl Olson Autograph 1951 - 1957
Ted Olson Autograph 1936 - 1938
Tim Olson Autograph 2004 - 2005
Mike Olt Autograph 2012 - 2015
Ed Olwine Autograph 1986 - 1988
Brian Omogrosso Autograph 2012 - 2013
Logan Ondrusek Autograph 2010 - 2016
Steve Ontiveros Autograph 1973 - 1980
Steve Ontiveros Autograph 1985 - 2000
Jose Oquendo Autograph 1983 - 1995
Mike Oquist Autograph 1993 - 1999
Ernie Oravetz Autograph 1955 - 1956
Luis Ordaz Autograph 1997 - 2006
Magglio Ordonez Autograph 1997 - 2011
Rey Ordonez Autograph 1996 - 2004
Joe Orengo Autograph 1939 - 1945
Kevin Orie Autograph 1997 - 2002
Paulo Orlando Autograph 2015 - 2018
Jesse Orosco Autograph 1979 - 2003
Pete Orr Autograph 2005 - 2013
John Orsino Autograph 1961 - 1967
Joe Orsulak Autograph 1983 - 1997
Jorge Orta Autograph 1972 - 1987
Anthony Ortega Autograph 2009 - 2009
Bill Ortega Autograph 2001 - 2001
Phil Ortega Autograph 1960 - 1969
David Ortiz Autograph 1997 - 2016
Hector Ortiz Autograph 1998 - 2002
Javier Ortiz Autograph 1990 - 1991
Jose Ortiz Autograph 2000 - 2002
Junior Ortiz Autograph 1982 - 1994
Luis Ortiz Autograph 1993 - 1996
Ramon Ortiz Autograph 1999 - 2013
Russ Ortiz Autograph 1998 - 2010
Daniel Ortmeier Autograph 2005 - 2008
John Orton Autograph 1989 - 1993
Chad Orvella Autograph 2005 - 2007
Ozzie Osborn Autograph 1975 - 1975
Bobo Osborne Autograph 1957 - 1963
Donovan Osborne Autograph 1992 - 2004
Keith Osik Autograph 1996 - 2005
Dan Osinski Autograph 1962 - 1970
Franquelis Osoria Autograph 2005 - 2008
Claude Osteen Autograph 1957 - 1975
Darrell Osteen Autograph 1965 - 1970
Jimmy Osting Autograph 2001 - 2002
Brian Ostrosser Autograph 1973 - 1973
Joe Ostrowski Autograph 1948 - 1952
Al Osuna Autograph 1990 - 1996
Antonio Osuna Autograph 1995 - 2005
Roberto Osuna Autograph 2015 - 2019
Roy Oswalt Autograph 2001 - 2013
Willis Otanez Autograph 1998 - 1999
Ricky Otero Autograph 1995 - 1997
Amos Otis Autograph 1967 - 1984
Akinori Otsuka Autograph 2004 - 2007
Billy Ott Autograph 1962 - 1964
Ed Ott Autograph 1974 - 1981
Adam Ottavino Autograph 2010 - 2019
Jim Otten Autograph 1974 - 1981
Dave Otto Autograph 1987 - 1994
Jimmy Outlaw Autograph 1937 - 1949
Josh Outman Autograph 2008 - 2014
Lyle Overbay Autograph 2001 - 2014
Mike Overy Autograph 1976 - 1976
Juan Oviedo Autograph 2005 - 2014
Bob Owchinko Autograph 1976 - 1986
Dave Owen Autograph 1983 - 1988
Larry Owen Autograph 1981 - 1988
Marv Owen Autograph 1931 - 1940
Mickey Owen Autograph 1937 - 1954
Spike Owen Autograph 1983 - 1995
Eric Owens Autograph 1995 - 2003
Henry Owens Autograph 2006 - 2007
Henry Owens Autograph 2015 - 2016
Jayhawk Owens Autograph 1993 - 1996
Jerry Owens Autograph 2006 - 2009
Jim Owens Autograph 1955 - 1967
Rudy Owens Autograph 2014 - 2014
Chris Owings Autograph 2013 - 2019
Micah Owings Autograph 2007 - 2012
Rick Ownbey Autograph 1982 - 1986
Chris Oxspring Autograph 2005 - 2005
Ray Oyler Autograph 1965 - 1970
Marcell Ozuna Autograph 2013 - 2019
Pablo Ozuna Autograph 2000 - 2008


The player with the earliest debut date on the chart above is Joe Oeschger , who made his major league debut on April 21, 1914!

Hall of Famers in our collection from this page are non-existant (sorry). The two who were Major League players with a last name that begins with an 'O' are Jim O'Rourke & Mel Ott .

Did you know that U.S. State that starts with an 'O' that has the most ballplayers born in it is Ohio ?

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