The Kid from Left Field

The Kid from Left Field is a 1953 baseball film starring Dan Dailey, Anne Bancroft, Lloyd Bridges, and Billy Chapin. The film marked the reunion of Dailey and director Harmon Jones who had teamed up at 20th Century Fox a year earlier in another baseball film, the biographical The Pride of St. Louis.

Former ballplayer Coop Dailey is working as a peanut vendor at the ballpark of a struggling major league club, the Bisons. He has passed on his love of the game to his son Christie Chapin, but after sneaking his son into the game one too many times, he is fired from his job. Christie ingratiates himself with the former owners niece Bancroft and gets his fathers job back as well as a position as batboy for himself.As a publicity stunt, Christie is named their youngest manager ever, but when he falls ill, Coop replaces him as manager. The Bisons win the pennant and earn a spot in the World Series. ........

Source: Wikipedia