How many earthquakes in California per year?

The franchise's organizational roots trace back to the San Francisco Bay Blackhawks of the Western Soccer League in 1989, which merged with the American Soccer League the following year to form the American Professional Soccer League. Blackhawks owner Dan Van Voorhis later pulled his team out of the APSL in 1992, after which they played as the San Jose Hawks in the USISL in 1993. Van Voorhis then successfully led the San Jose bidding group to become one of Major League Soccer's inaugural teams, handing over all existing Hawks player contracts, front-office resources and the rights to play in Spartan Stadium to MLS in exchange for Type C stock in the league (he was also to become the franchise's investor/operator until outside concerns forced him otherwise prior to the league's launch).