Mad Play (foaled 1921 in Kentucky) was an American-bred Thoroughbred racehorse.
He was a full brother to 1921 U.S. Champion Older Male Horse Mad Hatter.
Mad Play was trained by Sam Hildreth and he was ridden by Earl Sande.
3 that year at Latonia Race Track in Convington, Kentucky, losing to Sarazen.
Upon retirement Mad Play, was found to be completely sterile.