He just happened to be walking by as some golfer was getting ready to swing, and offered a fun play-by-play announcement of how he was doing.
Source: Bro Bible
It was a pretty epic weekend of golf at the AT&T Pebble Beach National Pro-Am, with Phil Mickelson destroying Tiger Woods on the final day to take the $1,152,000 first prize.
But the big star at Pebble Beach was Bill Murray, like he always is.