On July 17, 1978 In the latest incident in his feud with manager Billy Martin, the Yankees’ Reggie Jackson ignores instructions and attempts to bunt in the 10th inning of a tie game with the Royals. Jackson pops up, the Yanks lose, 9 – 7, in the 11th, and Martin serves Jackson with a five-day suspension without pay. The Royals’ three-game sweep at Yankee Stadium leaves New York in 4th place, 14 games behind the Red Sox.
Source
Baseball Reference July 17