Sam's Son (1984)

Sam's Son is a film written and directed by Michael Landon and released theatrically in the fall of 1984 (his only big-screen movie as a writer/director). Like Landon's TV film The Loneliest Runner it is loosely based on Landon's early life, and follows the coming-of-age story of a young man who, embarrassed by his large ears, grows his hair long (covering them), later coming to believe that this gives him athletic prowess as a javelin thrower (much like Samson of the Old Testament).

More at Wikipedia.