Carney Lansford, whose error led to two unearned runs in the second inning, broke a 2-2 tie with a 14th-inning single in New York.
Mike Heath opened the 14th with a double off George Frazier (3-3). Bill Almon sacrificed and was safe at first on Frazier's error. Davey Lopes grounded to second baseman Willie Randolph, who tagged Almon, but Lansford singled.
Right fielder Mike Davis threw out the potential tying run at the plate in the bottom of the 14th.
The Yankees had no good news: they learned that shortstop Andre Robertson has been lost for the season and that the AL had denied Manager Billy Martin's latest protest in the pine-tar game controversy.
Robertson, injured in an auto accident Tuesday, was found to have a fracture of the second cervical vertebra, as well as a broken rib, separated left shoulder and contusions. He will wear a neck brace for six to eight weeks.
Martin filed the protest as the game, in which the Kansas City Royals beat the Yankees, 5-4, resumed on Thursday. Martin appealed, claiming that U.L. Washington did not touch second base and George Brett, whose home run with an illegal bat ultimately proved decisive, did not touch first when the homer was hit on July 24.