Johnny Mize's Three-Home-Run Game, 1940

Johnny Mize hit three home runs in one game for the St. Louis Cardinals against the Pittsburgh Pirates on September 8, 1940. The St. Louis Cardinals lost 16–14.

The game was played at Sportsman's Park III in St. Louis. The game took 3h 17m. It was a day game.

Johnny Mize did it six times in all. Rip Sewell started for the Pittsburgh Pirates. Lou Jorda umpired behind the plate. It is the last of four three-home-run games the archive records that season.