From Wikipedia, the free encyclopedia. Brett Marx (born December 26, 1964) is an American movie and television actor. Best known as "Jimmy Feldman" in the Bad News Bears movies, Marx was born in Los Angeles, California. He has also appeared on television, in one episode each of Tales from the Darkside, My Two Dads and Party of Five.[1] In 1981, he was nominated for a Genie Award for Best Performance by a Foreign Actor in The Lucky Star.[2] Today, Marx is a commercial and film producer. He is ...