| ^Oak City FC (2016-None) |
| ^Oak City FC (2016) |
|
2016 WPSL
|
|
|
| ^Oakland Clippers (1967-1968) |
| ^Oakland Clippers (1967-1968) |
|
1967 NPSL
|
1968 NASL
|
|
| ^Oakland F.C. (1910-1911) |
| ^Oakland F.C. (1910-1911) |
|
1910-1911 BCSL
|
|
|
| ^Oakland Roots Sports Club (2019-None) |
| ^Oakland Roots S.C. (2019) |
|
2019-2020 NISA - Fall Showcase
|
2019-2020 NISA - Spring Season
|
2020-2021 NISA - Fall Season
|
|
| ^Oakville Blue Devils (2015-None) |
| ^Oakville Blue Devils (2015) |
|
2005 CPSL
|
2006 CSL
|
2015 L1O
|
2016 L1O
|
| ^Oakville CW (1996-None) |
| ^Oakville CW (1996) |
|
1996 CNSL
|
|
|
| ^Oakville United (1975-None) |
| ^Oakville United (1975) |
|
1975 NSL-D2
|
|
|
| ^O'Brien Live Wires (1912-1913) |
| ^O'Brien Live Wires (1912-1913) |
|
1912-1913 StLAFL
|
|
|
| ^Ocala Stampede (2012-None) |
| ^Ocala Stampede (2012) |
|
2012 USL PDL
|
2013 USL PDL
|
2014 USL PDL
|
2015 PDL
|
| ^Occidental A.C. (1903-1905) |
| ^Occidental A.C. (1903-1905) |
|
1903-1904 CAFL
|
1904-1905 CAFL
|
|
| ^Ocean City Nor'easters (1997-None) |
| ^Ocean City Nor'easters (1997) |
|
2005 USL PDL
|
2006 USL PDL
|
2007 USL PDL
|
2008 USL PDL
|
|
2009 USL PDL
|
2010 USL PDL
|
2011 USL PDL
|
2012 USL PDL
|
|
2013 USL PDL
|
2014 USL PDL
|
2015 PDL
|
2016 PDL
|
| ^South Jersey Barons (1997-2004) |
|
1997 USISL D3-Pro
|
1998 USISL D3-Pro
|
1999 USL D3 Pro
|
|
| ^Oertli Markets (1935-1936) |
| ^Oertli Markets (1935-1936) |
|
1935-1936 MilMSL
|
|
|
| ^Ogden Outlaws (2006-None) |
| ^Ogden Outlaws (2006) |
|
2006 USL PDL
|
2007 USL PDL
|
2008 USL PDL
|
2009 USL PDL
|
|
2010 USL PDL
|
2011 USL PDL
|
2012 USL PDL
|
|
| ^Ohio XOGGZ (1994-1998) |
| ^Ohio XOGGZ (1994-1996) |
| ^Columbus F.C. XOGGZ (1994-1995) |
|
1994 USISL
|
1995 USISL-Pro
|
|
| ^Ohio XOGGZ (1996-1996) |
|
1996 USISL-Select
|
|
|
| ^Columbus ZIGGX (1994-1998) |
|
1994 USWISL
|
1995 USWISL
|
1996 USWISL
|
1997 USISL W-League
|
|
1998 USISL W-League
|
|
|
| ^Ohio Galaxies (2012-None) |
| ^Ohio Galaxies (2012) |
|
2012 WPSL
|
2013 WPSL
|
2014 WPSL
|
|
| ^Ohio Premier Women's SC (2008-None) |
| ^Ohio Premier Women's SC (2008) |
|
2008 WPSL
|
2009 WPSL
|
2010 WPSL
|
2011 WPSL
|
|
2012 WPSL
|
|
|
| ^Ohio Vortex (2009-None) |
| ^Ohio Vortex (2009) |
|
2009-2010 PASL-Pro
|
2010-2011 PASL-Pro
|
2011-2012 PASL
|
2012-2013 PASL
|
| ^Okanagan Challenge S.C. (1990-2012) |
| ^Okanagan Challenge S.C. (1990-2012) |
|
1998 USISL PDSL
|
|
|
| ^Okanagan Predators (2001-None) |
| ^Okanagan Predators (2001) |
|
2001 USL PDL
|
|
|
| ^OKC Energy FC (2014-None) |
| ^OKC Energy FC (2014) |
|
2014 USL2
|
2015 USL
|
2016 USL
|
|
| ^OKC Energy FC U23 (2016-None) |
| ^OKC Energy FC U23 (2016) |
|
2016 PDL
|
|
|
| ^Oklahoma City FC (2008-None) |
| ^Oklahoma City FC (2008) |
|
2013 USL PDL
|
2013 WPSL
|
2014 NPSL
|
|
| ^Oklahoma City FC (2013-None) |
| ^Oklahoma City FC (2013) |
|
2014 WPSL
|
2015 WPSL
|
2016 WPSL
|
|
| ^Oklahoma Football Club (2012-None) |
| ^Oklahoma Football Club (2012) |
|
2012 WPSL
|
|
|
| ^Oklahoma City Energy FC (2017-2017) |
| ^Oklahoma City Energy FC (2017-2017) |
|
2017 USL
|
|
|
| ^Oklahoma City Hatters (1998-1998) |
| ^Oklahoma City Warriors/Hatters (1998-1998) |
|
1998 USISL PDSL
|
|
|
| ^Oklahoma City Heat (1996-1996) |
| ^Oklahoma City Heat (1996-1996) |
|
1996 USISL Premier
|
|
|
| ^Oklahoma City Slickers (1982-1983) |
| ^Oklahoma City Slickers (1982-1983) |
|
1982 ASL
|
1983 ASL
|
|
| ^Oklahoma City Spirit S.C. (1990-None) |
| ^Oklahoma City Spirit S.C. (1990-1992) |
|
1990 LSSA
|
1991 LSSA
|
1992 LSSA
|
|
| ^Oklahoma City Warriors (1986-1998) |
| ^Oklahoma City Warriors (1986-1998) |
| ^Oklahoma City Warriors (1986-1993) |
|
1986-1987 SISL
|
1987-1988 SISL
|
1988-1989 SISL
|
1989 SOSL
|
|
1989-1990 SISL
|
1990 SISL
|
1990-1991 SISL
|
1991 SISL
|
|
1991-1992 SISL
|
1992 USISL
|
1992-1993 USISL
|
2008 WPSL
|
|
2009 WPSL
|
2010 WPSL
|
2011 WPSL
|
|
| ^Oklahoma City Slickers (1993-1993) |
|
1993 USISL
|
|
|
| ^Oklahoma City Warriors (1993-1994) |
|
1993-1994 USISL
|
|
|
| ^Oklahoma City Slickers (1994-1996) |
|
1994 USISL
|
1994-1995 USISL
|
1995 USISL Premier
|
1995-1996 USISL-Indoor
|
| ^Oklahoma City Alliance (1996-1998) |
|
1996-1997 USISL-Indoor
|
1997-1998 USISL I-League
|
|
| ^Oklahoma City Warriors (1998-1998) |
|
1997-1998 USISL I-League
|
|
|
| ^Oklahoma City Wind (1999-1999) |
| ^Oklahoma City Wind (1999-1999) |
|
1999 W-League
|
|
|
| ^Oklahoma Outrage (2000-None) |
| ^Oklahoma Outrage (2000) |
|
2000 W-League
|
2001 W-League
|
2002 W-League
|
|
| ^Old Dominion Cesena USA (2016-None) |
| ^Old Dominion Cesena USA (2016) |
|
2016 WPSL
|
|
|
| ^O'Learys (1907-1912) |
| ^O'Learys (1907-1912) |
| ^Kinloch (1907-1909) |
|
1907-1908 AFLStL
|
|
|
| ^O'Learys (1910-1912) |
|
1910-1911 StLAFL - First Half
|
1911-1912 ASFL
|
|
| ^Olympic Force (2015-None) |
| ^Olympic Force (2015) |
|
2015 WPSL
|
|
|
| ^Olympia S.C. (1965-1967) |
| ^Olympia S.C. (1965-1967) |
|
1965-1966 ASL
|
1966-1967 ASL
|
|
| ^Olympic Club (1914-1921) |
| ^Olympic Club (1914-1921) |
|
1914-1915 CAFL
|
1915-1916 CFL
|
1916-1917 CFL
|
1917-1918 CFL
|
|
1918 CFL
|
1918-1919 CFL
|
1919-1920 CFL
|
1920-1921 CFL
|
| ^Omaha Flames (1996-1998) |
| ^Omaha Flames (1996-1998) |
|
1996 USISL Premier
|
1996-1997 USISL-Indoor
|
1997 USISL PDSL
|
1997-1998 USISL I-League
|
| ^Omaha Vipers (2010-None) |
| ^Omaha Vipers (2010) |
|
2010-2011 MISL
|
|
|
| ^Ontario Fury (2013-None) |
| ^Ontario Fury (2013) |
|
2013-2014 PASL
|
2014-2015 MASL
|
2015-2016 MASL
|
2016-2017 MASL
|
| ^Orange County Blue Star (1997-2012) |
| ^Orange County Blue Star (1997-2012) |
|
2001 USL PDL
|
2002 USL PDL
|
2003 USL PDL
|
2004 USL PDL
|
|
2005 USL PDL
|
2006 USL PDL
|
2007 USL PDL
|
2008 USL PDL
|
|
2009 USL PDL
|
2010 USL PDL
|
2011 USL PDL
|
2012 USL PDL
|
| ^Orange County Zodiac (1997-1999) |
|
1997 USISL A-League
|
1998 USISL A-League
|
1999 USL A-League
|
|
| ^Orange County Pateadores FC (2011-None) |
| ^Orange County Pateadores FC (2011) |
|
2011 NPSL
|
2012 NPSL
|
2013 NPSL
|
|
| ^Orange County SC (2011-None) |
| ^Orange County SC (2011) |
|
2014 USL2
|
2015 USL
|
2016 USL
|
2017 USL
|
| ^Orange County SC U-23 (2011-None) |
| ^Orange County SC U-23 (2011) |
|
2011 USL PDL
|
2012 USL PDL
|
2013 USL PDL
|
2014 USL PDL
|
|
2015 PDL
|
2016 PDL
|
|
| ^Orange County Waves (2011-None) |
| ^Orange County Waves (2011) |
|
2000 USL A-League
|
2011 WPSL
|
|
| ^Oregon Rush (2011-None) |
| ^Oregon Rush (2011) |
|
2011 WPSL
|
2012 WPSL
|
|
| ^Orlando City SC (2015-None) |
| ^Orlando City SC (2015) |
|
2012 USL PDL
|
2013 USL PDL
|
2014 USL PDL
|
2015 PDL
|
| ^Orlando City B (2016-None) |
| ^Orlando City B (2016) |
|
2015 MLS
|
2016 MLS
|
2016 USL
|
2017 MLS
|
|
2017 USL
|
|
|
| ^Orlando City U-23 (1998-2015) |
| ^Orlando City U-23 (1998-2011) |
| ^Central Florida Lionhearts (1998-1998) |
|
1998 USISL PDSL
|
|
|
| ^Central Florida Kraze (1999-2011) |
|
1999 USL PDL
|
|
|
| ^Orlando City U-23 (1998-2015) |
|
2011 USL2
|
2012 USL2
|
2013 USL2
|
2014 USL2
|
| ^Orlando Lions (1992-1996) |
| ^Orlando Lions (1992-1996) |
|
1992 USISL
|
1993 USISL
|
1993-1994 USISL
|
1994 USISL
|
|
1995 USISL Premier
|
1995-1996 USISL-Indoor
|
1996 USISL Premier
|
|
| ^Orlando Lions (1994-1994) |
|
1994 USWISL
|
|
|
| ^Orlando Lions S.C. (1986-1990) |
| ^Orlando Lions (1986-1990) |
|
1988 ASL
|
1989 ASL
|
1990 APSL
|
1994-1995 USISL
|
| ^Orlando Nighthawks (1997-1999) |
| ^Orlando Nighthawks (1997-1999) |
| ^Daytona Tigers (1997-1997) |
|
1997 USISL D3-Pro
|
|
|
| ^Orlando Nighthawks (1998-1999) |
|
1998 USISL D3-Pro
|
1999 USL PDL
|
|
| ^Orlando Ladyhawks (1998-1998) |
|
1998 USISL W-League
|
|
|
| ^Orlando Sundogs (1997-1997) |
| ^Orlando Sundogs (1997-1997) |
|
1997 USISL A-League
|
|
|
| ^Orlando Falcons (2006-None) |
| ^Orlando Falcons (2006) |
|
2006 WPSL
|
2007 WPSL
|
2008 WPSL
|
|
| ^Orlando Kicks FC (2016-None) |
| ^Orlando Kicks FC (2016) |
|
2016 WPSL
|
|
|
| ^Orlando Pride (2016-None) |
| ^Orlando Pride (2016) |
|
2016 NWSL
|
2017 NWSL
|
|
| ^Orlando Sharks (2007-None) |
| ^Orlando Sharks (2007) |
|
2007-2008 MISL
|
|
|
| ^OSA FC (2014-None) |
| ^OSA FC (2014) |
|
2014 WPSL
|
2015 WPSL
|
2016 WPSL
|
|
| ^OSA FC (2015-None) |
| ^OSA FC (2015) |
|
2015 NPSL
|
2016 NPSL
|
|
| ^Oscar Mayer Co. (1934-1936) |
| ^Oscar Mayer Co. (1934-1936) |
|
1934 MadMSL
|
1935-1936 EWSFL
|
1936-1937 WSSFL
|
|
| ^Oshawa Italia (1962-None) |
| ^Oshawa Italia (1962) |
|
1962 NSL
|
|
|
| ^Oshkosh Sport Club (1927-1964) |
| ^Oshkosh Sport Club (1927-1938) |
|
1928 EWSFL
|
1929 EWSFL
|
1929-1930 EWSFL
|
1930-1931 EWSFL
|
|
1931-1932 EWSFL
|
1932-1933 EWSFL
|
1933-1934 EWSFL
|
1934-1935 EWSFL
|
|
1935-1936 EWSFL
|
1937 CWSFL
|
1938 CWSFL
|
|
| ^Oshkosh Sport Club 2nd (1932-1934) |
|
1932-1933 EWSFL
|
1933-1934 EWSFL
|
|
| ^Oshkosh Aurochs (1954-1964) |
|
1955 WSSL
|
1956 WSSL
|
1957 WSSL
|
|
| ^Ottawa Fury Women (2000-None) |
| ^Ottawa Fury Women (2000) |
|
2000 W-League
|
2001 W-League
|
2002 W-League
|
2003 W-League
|
|
2004 W-League
|
2005 W-League
|
2006 W-League
|
2007 W-League
|
|
2008 W-League
|
2009 W-League
|
2010 W-League
|
2011 W-League
|
|
2012 W-League
|
2013 W-League
|
2014 W-League
|
|
| ^Ottawa Fury (2005-None) |
| ^Ottawa Fury (2005) |
|
2005 USL PDL
|
2006 USL PDL
|
2007 USL PDL
|
2008 USL PDL
|
|
2009 USL PDL
|
2010 USL PDL
|
2011 USL PDL
|
2012 USL PDL
|
|
2013 USL PDL
|
|
|
| ^Ottawa Fury FC (2014-None) |
| ^Ottawa Fury FC (2014) |
|
2014 NASL -
|
2015 NASL -
|
2016 NASL -
|
2017 USL
|
| ^Ottawa Fury Academy FC (2015-None) |
| ^Ottawa Fury Academy FC (2015) |
|
2015 PLSQ
|
2016 PLSQ
|
|
| ^Ottawa Intrepid (1987-None) |
| ^Ottawa Intrepid (1987) |
|
1987 CSL
|
1988 CSL
|
1989 CSL
|
1990 CSL
|
| ^Ottawa Selects (1975-None) |
| ^Ottawa Selects (1975) |
|
1975 NSL-D2
|
|
|
| ^Ottawa Sons of Italy (1970-None) |
| ^Ottawa Sons of Italy (1970) |
|
1970 NSL
|
|
|
| ^Ottawa Tigers (1971-None) |
| ^Ottawa Tigers (1971) |
|
1971 NSL
|
1972 NSL
|
1973 NSL
|
1974 NSL
|
|
1975 NSL-D2
|
1976 NSL-D2
|
1977 NSL-D2
|
1978 NSL
|
| ^Ottawa Wizards (2001-None) |
| ^Ottawa Wizards (2001) |
|
2001 CPSL
|
2002 CPSL
|
2003 CPSL
|
|
| ^Oxford City FC of Texas (2012-None) |
| ^Oxford City FC of Texas (2012) |
|
2014-2015 MASL
|
|
|