As of the 2012 season there are 19 teams in Major League Soccer (MLS). Listed alphabetically the teams are:
Chicago Fire
Chivas USA
Colorado Rapids
Columbus Crew
DC United
FC Dallas
Houston Dynamo
Los Angeles Galaxy
Montreal Impact
New England Revolution
New York Red Bulls
Philadelphia Union
Portland Timbers
Real Salt Lake
San Jose Earthquakes
Seattle Sounders FC
Sporting Kansas City
Toronto FC
Vancouver Whitecaps FC
The Miami Fusion and the Tampa Bay Mutiny are the only 2 defunct MLS teams.
eighteen teams.(:
12 teams make it into the mls playoffs
The MLS or Major League Soccer currently has 19 teams in its league. Three of those teams are Canadian. Toronto was the first to join in 2006 making that the year the MLS was founded.
Chicago Fire...
there so good
By pro I guess you mean MLS which is the first tier of American soccer, in that case it's 15 teams.
yes
As of the 2011 season, there are currently 2 MLS teams that have Canadian home fields. Toronto FC and Vancouver Whitecaps FC.
yes NFL NBA MLB MLS
The Portland Timbers and the Vancouver Whitecaps.
The MLS all stars are playing Everton FC but otherwise MLS pretty well keeps to themselves. You could go to mlsnet.com to find out more but that's all I can think of off the top of my head. Hope this helps :)