Quantum Leap S01E03 - The Right Hand of God - October 24, 1974

Having leapt into Kid Cody, a boxer on the take, Sam has to win the championship to fund a new church for his trainers, a group of nuns.
Sam must face the bookie who counts on him to take a dive in the final bout, and, with the help of several trainers, streaking, and Al's appearance in the ring to guide his punches, Sam wins the bout and finacnes the chapel.