Billy Williams Hits for the Cycle, 1966

Billy Williams hit for the cycle for the Chicago Cubs against the St. Louis Cardinals on July 17, 1966: a single, a double, a triple and a home run in the same game. The Chicago Cubs won 7–2.

The game was played at Busch Stadium II in St. Louis. The announced attendance was 32,590. The game took 2h 31m. It was a day game.

It was the only time Billy Williams managed it. Art Mahaffey started for the St. Louis Cardinals. Ed Sudol umpired behind the plate. It is the first of two cycles the archive records that season.