Michael James Wuertz (born December 15, 1978) is an American former professional baseball pitcher.

He played in Major League Baseball (MLB) for the Chicago Cubs and Oakland Athletics.

He made his major league debut on April 5, 2004, against the Cincinnati Reds, throwing a perfect inning with two strikeouts.

In 2006, Wuertz spent part of the season on the disabled list, limited to 41 appearances.

On February 2, 2009, Wuertz was traded to the Oakland Athletics for minor leaguers Richie Robnett and Justin Sellers.