The A's beat the Orioles three games to one to win their third straight pennant, then defeated the Los Angeles Dodgers in the World Series for their third consecutive championship.
Southpaw Mike Cuellar pitched steady ball for the winners and got the decision with relief help in the ninth inning from Ross Grimsley.
A portent of things to happen came in the first inning when Paul Blair, second man in the batting order, hit a Hunter pitch for a home run.
When Cuellar yielded a single to Jesús Alou and a double to Claudell Washington, both pinch-hitters, to open the last of the ninth, he was pulled in favor of Grimsley, who got the last three outs without trouble.
In the eighth inning, with two men on—the result of a walk and an error—Ray Fosse hit a home run off reliever Grant Jackson to put the game on ice.
A force play provided the second out of the inning but Boog Powell's single drove in one run, finally ending a thirty-inning scoreless streak.