Updated

The North American Soccer League is focused on expanding to California as early as 2015, commissioner Bill Peterson says Tuesday.

Peterson says San Francisco, Los Angeles and San Diego are potential areas for future NASL franchises.

The seven-team NASL will begin its third season with three games Saturday.

Beginning this year, the league's regular season will be split into spring and fall round-robin competitions, with the winner of each half playing in November's Soccer Bowl.

The New York Cosmos will join the league for the fall season. The Puerto Rico Islanders suspended play this season to restructure, but are expected to return next year. Planned new teams in Indianapolis, Ottawa and Virginia would make it a 12-team league for 2014.

The league's current teams are in Atlanta, Carolina, Edmonton, Fort Lauderdale, Minnesota, San Antonio and Tampa Bay.