Alex Rodriguez had HALF A MILLION DOLLARS worth of stuff stolen from his rental car while he was in San Francisco broadcasting a Giants-Phillies game ... TMZ Sports has confirmed.
Law enforcement sources tell us the MLB legend -- who was in town for his ESPN gig as a baseball color commentator -- had his rented SUV broken into just a few blocks from Oracle Park on Sunday.
We're told the burglary happened around 10 PM ... and the thieves made off with $500,000 worth of electronics and jewelry.
Rodriguez had been at the stadium nearly the entire day .