Major League Soccer. Formed in 1993 in the United States, the league as of 2009 has fifteen teams throughout North America. Attendance has been steadily growing in recent years, and if pace continues, it will overtake the NHL in popularity and profit.
Teams as of 2009:
(Eastern Conference)
Chicago Fire
Columbus Crew
DC United (Washington, D.C.)
Kansas City Wizards
New England Revolution (Foxborough, MA)
New York Red Bulls (East Rutherford, NJ)
Toronto FC
(Western Conference)
Chivas USA (Carson, CA)
Colorado Rapids (Commerce City, CO)
FC Dallas (Frisco, TX)
Houston Dynamo
Los Angeles Galaxy
Reál Salt Lake (Sandy, UT)
San Jose Earthquakes
Seattle Sounders
MLS plans to add three more teams by 2011, in Philadelphia PA, Portland OR, and Vancouver BC.