On June 10, 1944, Joe Nuxhall made his Major League debut, pitching for the Cincinnati Reds. Nuxhall was 15 years, 10 mos. and 11 days old at the time. He retired 2 batters and allowed 5 runs, all earned, in an 18-0 Cincy loss.
Nuxhall’s next MLB appearance came almost 8 full years later, in 1952.