As expected, the bill has some rather broad language that makes it appear that it could be applicable to any pro sports franchise. Once you scroll down the page a little, you get to the part that makes it abundantly clear that Migden is referring to an NFL franchise, namely the 49ers.
(5) "Professional sports franchise" means a franchise or other entity operated for the exhibition of National Football League games, and any affiliate organized to develop or operate a sports stadium.Not sure why Migden simply didn't replace "professional sports franchise" with "National Football League franchise." I doubt NFL commish Roger Goodell and the owners are going to rush to change the league's name in response to the bill. In any case, the A's aren't likely to be affected.
Ironically, passage of SB 49 could prevent the 49ers (and/or the Raiders) from staying in the Bay Area. If enacted, the 49ers would be restricted from moving to Santa Clara. That would force the team (barring appeals, of course) to deal with San Francisco, but if a deal fell through there, the team would be forced to look outside the Bay Area altogether. Even Sacramento, which is 90 miles away from SF, would be out of bounds. Los Angeles, however, wouldn't. Should the bill pass, it wouldn't be the least bit surprising to see a great deal of support coming from Southern California. Ouch.
SB 49 will probably face revision as it runs through committee. We'll see if it stays intact or gets neutered, as SB 4 did in 2005. Who knows, references to the NFL could be removed, or the 100 mile restriction. Should either of those changes occur, owners of all fifteen major sports franchises in California could become seriously interested in the bill.
Note: The San Diego Chargers, who are looking for a new home somewhere in San Diego County, would also be stifled by the bill. They would have the ability to move to Los Angeles - but not Anaheim, which is closer than 100 miles away.