Johnny Mize's Three-Home-Run Game, 1938

Johnny Mize hit three home runs in one game for the St. Louis Cardinals against the New York Giants on July 20, 1938. The St. Louis Cardinals won 7–1.

The game was played at Sportsman's Park III in St. Louis. The announced attendance was 8,404. The game took 2h 03m. It was a day game.

Johnny Mize did it six times in all. Slick Castleman started for the New York Giants. Lee Ballanfant umpired behind the plate. It is the second of three three-home-run games the archive records that season.