Making fun of Bill Murray's golf game is one thing, but don't mess with his Chicago Cubs.

Mark Grace, the Cubs first baseman, hit his second shot at No. 10 at Pebble Beach in the National Pro-Am into a bunker Saturday and when he approached the green a fan yelled, "Not bad for a Cub."Murray, a big Cubs fan, walked toward the fan in mock anger saying: "Who said that? The man with the square head?" .

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After Murray and his pro partner Scott Simpson and Grace and his partner Jeff Sluman finished the hole, Grace took a baseball bat out of his bag, handed a golf ball to Simpson and had Simpson toss the ball in the air.

Grace's first swing was a high drive into the Pacific Ocean. His second was a swing and miss, prompting the Giants fan to yell, "Once a Cub, always a Cub."

Simpson, who had pulled on a Cubs sweatshirt, whacked his first try into the ocean. Then Murray hit a couple of drives deep into the sea.

Sluman, who never took a swing with the bat, walked off the course laughing, shook his head and said: "I guess I'm not a ballplayer."