Michael John "Mike" Sweeney (born July 22, 1973 in Orange, California) is a Major League Baseball first baseman who is currently a free agent. Sweeney played his first 13 seasons in the majors with the Kansas City Royals, originally as a catcher and then moving to first base. Sweeney has also played for the Oakland Athletics, Seattle Mariners, and Philadelphia Phillies
Sweeney made his major league debut on September 14, 1995 as a catcher. He got his first major league base hit against Cleveland Indians' pitcher Paul Assenmacher at Jacobs Field in the final game of the season. While his ability with the bat impressed the Royals, they were less than enamored with his skills behind the plate.
He hit his first home run off Seattle Mariners' pitcher Jamie Moyer on August 12, 1996. It was a three-run shot.