Major League Soccer is active in Canada.
Major League Soccer . MLS constitutes one of the major professional sports leagues of the United States and Canada . The league comprises 22 teams -- 19 in the U.S. and 3 in Canada . The league has a fixed membership , like most sports leagues in the United States and Canada , which makes it one of the world 's few soccer leagues that does not use promotion and relegation , a practice that is uncommon in the two countries .