The major professional sports leagues are those professional sports leagues with the largest fan bases and television audiences (and therefore, the largest revenues and player salaries).

North American leagues

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As of 2005, there is no universally accepted definition or list, but the following four North American professional leagues are always defined as the major leagues:

• The National Football League (32 clubs as of 2006, founded in 1920). The NFL partially absorbed the All-America Football Conference in 1949 and merged with the American Football League in 1970.
• Major League Baseball (30 clubs as of 2006, formally founded in 1920 though constituent leagues began cooperation in 1903). MLB is divided into the American League (founded in 1901) and the National League (founded in 1876). The two are effectively merged on an organizational level.
• The National Basketball Association (30 clubs as of 2006, founded in 1946). The NBA partially absorbed the rival American Basketball Association in 1976.
• The National Hockey League (30 clubs as of 2006, founded in 1917). The NHL partially absorbed the rival World Hockey Association in 1979.

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What matters is they got em lol RT @neishamfbaby: They wear Space Jams on high School basketball teams. smh. Yall just getting them?
brooklynblack (EL PIASO FEO) Tue, 22 Dec 2009 20:24:07 -0000
What matters is they got em lol RT @neishamfbaby: They wear Space Jams on high School basketball teams. smh. Yall just getting them?
RT @Adam_Schefter: Ravens will sign their former CB Corey Ivy today. He is expected to help the Ravens this weekend on special teams.
FABEWASH31 (FABIAN WASHINGTON) Tue, 22 Dec 2009 20:23:52 -0000
RT @Adam_Schefter: Ravens will sign their former CB Corey Ivy today. He is expected to help the Ravens this weekend on special teams.
NFL Playoffs: Minnesota's Struggles Not a Concern: As the playoffs approach for the 2009-2010 season teams are eith... http://bit.ly/7WkdzP
BR_NFL (Bleacher Report) Tue, 22 Dec 2009 20:23:35 -0000
NFL Playoffs: Minnesota's Struggles Not a Concern: As the playoffs approach for the 2009-2010 season teams are eith... http://bit.ly/7WkdzP
Snapshots >> 01-02, 07-08 Red Wings named as two of decade's best teams in ESPN's '10 On Ice' http://bit.ly/6V1Dgx
redwingsbuzztap (Detroit Red Wings) Tue, 22 Dec 2009 20:22:29 -0000
Snapshots >> 01-02, 07-08 Red Wings named as two of decade's best teams in ESPN's '10 On Ice' http://bit.ly/6V1Dgx
@Hoopsworld Re: Grizz, is there a pattern to teams getting better after Iverson leaves?
martzmimic (Chris Lambert) Tue, 22 Dec 2009 20:22:11 -0000
@Hoopsworld Re: Grizz, is there a pattern to teams getting better after Iverson leaves?
@optajoe re: celtic/rangers is this a reflection that other teams sit back and defend against old firm opponents?
laurapea (laura pearson) Tue, 22 Dec 2009 20:22:09 -0000
@optajoe re: celtic/rangers is this a reflection that other teams sit back and defend against old firm opponents?

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