Rookie of the Year is a light-hearted comedy about a 12-year-old baseball fan who, despite his love for the sport, can't play the game at all. During one Little League contest, he breaks his arm. After it heals, it miraculously becomes a super-human arm that can out-pitch any player in the major leagues. The boy joins the Chicago Cubs and helps lead them to the World Series. Though the plot is silly and contrived, it's a pleasant film that is ideal for young sports fans.
~ Stephen Thomas Erlewine, All Movie Guide