Dr. John York shares how he’s always nervous before 49ers’ games

49ers co-chairman Dr. John York joins KNTV's Raj Mathai to discuss how he can't wait for Super Bowl 58 to start, and how proud he is of his son and 49ers CEO Jed York for how he's run the franchise.Dr. John York shares how he's always nervous before 49ers' games originally appeared on NBC Sports Bay Area