Teams: There are 20. The Eastern and Western conferences have 10 each.
Expansion: New York City FC and Orlando City SC began play this year.
Future expansion: Atlanta, Miami, Los Angeles and Minnesota by 2018.
The season: Play began in early March. The regular season ends on Oct. 25; the MLS Cup playoffs begin on Oct. 28.
Title game: The MLS Cup will be played in early December. Date and site to be determined.
Attendance: 19,147 average for 2014 regular season, 23,633 for playoffs.
TV: The MLS recently signed an eight-year deal with ESPN, Fox Sports and Univision.