John Edward "Jack" Weisenburger (born August 2, 1926) is a former American football and baseball player. He played college football for the University of Michigan from 1944 to 1947 and was the starting fullback for the undefeated 1947 Michigan Wolverines football team that became known as the "Mad Magicians" and has been rated as the greatest football team in Michigan history. He later played professional baseball for five years from 1948 to 1952.