American soccer writing, history & data.
| Team | Location | Years |
|---|---|---|
| O'Brien Live Wires | St. Louis, MO | 1912-1913 |
| O'Learys Lineage | - | 1910-1912 |
| Lineage: O'Learys | Related teams: Kinloch, O'Learys | ||
| O'Learys | St. Louis, MO | 1910-1912 |
| Lineage: O'Learys | Related teams: Kinloch | ||
| Oak City FC | - | 2016 |
| Oakland Clippers | Oakland, CA | 1967-1968 |
| Oakland F.C. | Oakland, CA | 1910-1910 |
| Lineage: Corinthian F.C. | Related teams: Corinthian F.C. | ||
| Oakland F.C. | Oakland, CA | 1910-1911 |
| Oakland Hornets A.F.C. | Oakland, CA | 1903-1909 |
| Lineage: Barbarian A.C. | Related teams: Barbarian A.C. | ||
| Oakland Rangers F.C. | Oakland, CA | 1913-1914 |
| Lineage: Rangers F.C. | Related teams: Rangers F.C., Rangers' F. and A.C. | ||
| Oakland Roots S.C. | Oakland, CA | 2019 |
| Oakland Stompers | Oakland, CA | 1978-1978 |
| Lineage: Edmonton Drillers | Related teams: Connecticut Bicentennials, Edmonton Drillers, Hartford Bicentennials | ||
| Oakland/Golden Bay Buccaneers | Berkeley, CA | 1976-1976 |
| Oakville Blue Devils | - | 2015 |
| Oakville CW | - | 1996 |
| Oakville United | - | 1975 |
| Ocala Stampede | - | 2012 |
| Occidental A.C. | San Francisco, CA | 1903-1905 |
| Ocean City Nor'easters | - | 1997 |
| Oertli Markets | Milwaukee, WI | 1935-1936 |
| Ogden Outlaws | - | 2006 |
| Ohio Galaxies | - | 2012 |
| Ohio Premier Women's SC | - | 2008 |
| Ohio Vortex | - | 2009 |
| Ohio XOGGZ Lineage | - | 1996-1996 |
| Lineage: Ohio XOGGZ | Related teams: Columbus F.C. XOGGZ, Ohio XOGGZ | ||
| Ohio XOGGZ | Dublin, OH | 1996-1996 |
| Lineage: Ohio XOGGZ | Related teams: Columbus F.C. XOGGZ | ||
| Okanagan Challenge S.C. | Kelowna, BC | 1990-2012 |
| Okanagan Predators | - | 2001 |
| OKC Energy FC | - | 2014 |
| OKC Energy FC U23 | - | 2016 |
| Oklahoma City Alliance | Oklahoma City, OK | 1996-1998 |
| Lineage: Oklahoma City Warriors | Related teams: Oklahoma City Slickers, Oklahoma City Slickers, Oklahoma City Warriors, Oklahoma City Warriors, Oklahoma City Warriors | ||
| Oklahoma City Energy FC | Oklahoma City, OK | 2017-2017 |
| Oklahoma City FC | - | 2008 |
| Oklahoma City FC | - | 2013 |
| Oklahoma City Heat | Oklahoma City, OK | 1996-1996 |
| Oklahoma City Slickers | Oklahoma City, OK | 1982-1983 |
| Oklahoma City Slickers | Oklahoma City, OK | 1993-1993 |
| Lineage: Oklahoma City Warriors | Related teams: Oklahoma City Alliance, Oklahoma City Warriors, Oklahoma City Warriors, Oklahoma City Warriors | ||
| Oklahoma City Slickers | Oklahoma City, OK | 1994-1996 |
| Lineage: Oklahoma City Warriors | Related teams: Oklahoma City Alliance, Oklahoma City Warriors, Oklahoma City Warriors, Oklahoma City Warriors | ||
| Oklahoma City Spirit S.C. | Oklahoma City, OK | 1990-1992 |
| Oklahoma City Stampede | Oklahoma City, OK | 1984-1984 |
| Lineage: Tulsa Tornado's | Related teams: Tulsa Tornado's | ||
| Oklahoma City Warriors Lineage | - | 1986-1998 |
| Lineage: Oklahoma City Warriors | Related teams: Oklahoma City Alliance, Oklahoma City Slickers, Oklahoma City Slickers, Oklahoma City Warriors, Oklahoma City Warriors, Oklahoma City Warriors | ||
| Oklahoma City Warriors | Oklahoma City, OK | 1986-1993 |
| Lineage: Oklahoma City Warriors | Related teams: Oklahoma City Alliance, Oklahoma City Slickers, Oklahoma City Slickers | ||
| Oklahoma City Warriors | Oklahoma City, OK | 1993-1994 |
| Lineage: Oklahoma City Warriors | Related teams: Oklahoma City Alliance, Oklahoma City Slickers, Oklahoma City Slickers | ||
| Oklahoma City Warriors | Oklahoma City, OK | 1998-1998 |
| Lineage: Oklahoma City Warriors | Related teams: Oklahoma City Alliance, Oklahoma City Slickers, Oklahoma City Slickers | ||
| Oklahoma City Warriors/Hatters | Oklahoma City, OK | 1998-1998 |
| Oklahoma City Wind | Oklahoma City, OK | 1999-1999 |
| Oklahoma Football Club | - | 2012 |
| Oklahoma Outrage | - | 2000 |
| Old Dominion Cesena USA | - | 2016 |
| Olympia S.C. | New Britain, CT | 1965-1967 |
| Olympic Club | San Francisco, CA | 1914-1921 |
| Olympic Force | - | 2015 |
| Omaha Flames | Omaha, NE | 1996-1998 |
| Omaha Vipers | - | 2010 |
| Ontario Fury | - | 2013 |
| Orange County Blue Star | - | 1997-2012 |
| Orange County Pateadores FC | - | 2011 |
| Orange County SC | - | 2011 |
| Orange County SC U-23 | - | 2011 |
| Orange County Waves | - | 2011 |
| Orange County Zodiac | Irvine, CA | 1997-1999 |
| Oregon Rush | - | 2011 |
| Orlando City B | - | 2016 |
| Orlando City SC | - | 2015 |
| Orlando City U-23 | - | 1998-2015 |
| Orlando Falcons | - | 2006 |
| Orlando Kicks FC | - | 2016 |
| Orlando Ladyhawks | Orlando, FL | 1998-1998 |
| Orlando Lions | Orlando, FL | 1986-1990 |
| Orlando Lions | Orlando, FL | 1992-1996 |
| Orlando Lions | Orlando, FL | 1994-1994 |
| Orlando Nighthawks Lineage | - | 1998-1999 |
| Lineage: Orlando Nighthawks | Related teams: Daytona Tigers, Orlando Nighthawks | ||
| Orlando Nighthawks | Orlando, FL | 1998-1999 |
| Lineage: Orlando Nighthawks | Related teams: Daytona Tigers | ||
| Orlando Pride | - | 2016 |
| Orlando Sharks | - | 2007 |
| Orlando Sundogs | Orlando, FL | 1997-1997 |
| OSA FC | - | 2014 |
| OSA FC | - | 2015 |
| Oscar Mayer Co. | Madison, WI | 1934-1936 |
| Oshawa Italia | - | 1962 |
| Oshkosh Aurochs | Oshkosh, WI | 1954-1964 |
| Oshkosh Sport Club | Oshkosh, WI | 1927-1938 |
| Oshkosh Sport Club 2nd | Oshkosh, WI | 1932-1934 |
| Oster S.C. | Racine, WI | 1952-1996 |
| Oster S.C. Reserves | Racine, WI | 1957-1969 |
| Ottawa Fury | - | 2005 |
| Ottawa Fury Academy FC | - | 2015 |
| Ottawa Fury FC | - | 2014 |
| Ottawa Fury Women | - | 2000 |
| Ottawa Intrepid | - | 1987 |
| Ottawa Selects | - | 1975 |
| Ottawa Sons of Italy | - | 1970 |
| Ottawa Tigers | - | 1971 |
| Ottawa Wizards | - | 2001 |
| Oxford City FC of Texas | - | 2012 |