Leonard James Matuszek (born September 27, 1954, in Toledo, Ohio) was a Major League Baseball outfielder and first baseman. He is an alumnus of the University of Toledo, where he played both varsity baseball and basketball. Len attended Moeller High School in Cincinnati.
Drafted by the Philadelphia Phillies in the 5th round of the 1976 MLB amateur draft, Matuszek would make his major league debut with the Philadelphia Phillies on September 3, 1981, and appear in his final game on April 30, 1987.
Matuszek is known for taking over the role as starting first baseman for the Philadelphia Phillies after they released Pete Rose following the 1983 season. In his first and only season as the Phillies starting first baseman, Matuszek compiled a .248 batting average with 12 home runs and 43 runs batted in during the 1984 season.