Oakland broke an American League record by getting singles from its first eight batters, good for five runs, in the first inning of the opener but Chicago retaliated with eight home runs in the doubleheader for a sweep that knocked the host A's out of the AL West lead, a half game behind Kansas City.

Harold Baines, Chet Lemon and Carlton Fisk had two apiece of the Chicago homers. Fisk's, both in the second game, were his first homers since May 15. A three-run homer by Baines and a solo homer by Wayne Nordhagen gave Chicago a fast 4-0 lead in the second game and Jerry Koosman coasted to his fourth victory in 16 decisions.

In the opener, Lamarr Hoyt (8-3) settled down to pitch nine scoreless innings of relief and win. Chet Lemon and Tony Bernazard hit two-run homers in the sixth inning that tied and won it for the Sox.

Hoyt relieved Ross Baumgarten after five Oakland singles and gave up three more as the A's tied the major league record for consecutive hits at the outset of a game and the league record for successive singles in any inning (set by the Washington Senators in 1951; the major league mark is 10).