William Richard Mueller (born March 17, 1971) is a former Major League Baseball third baseman. Mueller's playing career was spent with the San Francisco Giants (1996-2000, 2002), Chicago Cubs (2001-02), Boston Red Sox (2003-2005), and Los Angeles Dodgers (2006). He won the American League batting title in 2003, and helped the Red Sox win the 2004 World Series. He was a switch hitter and threw right-handed. The photo comes with a COA issued by Steiner Sports.

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