Steve Henderson drew a two-out, bases-loaded walk from Dave Righetti in the ninth inning in Oakland to force home the winning run against New York.
With one out in the ninth, Carney Lansford reached on an error by third baseman Dale Berra. Bruce Bochte followed with a short fly ball that got by the diving Rickey Henderson for a double, putting runners at second and third. Righetti then intentionally walked Dave Kingman to load the bases and then walked Henderson on four pitches to force home Lansford.
Jay Howell (2-2) worked 2 1/3 innings for the victory, yielding one run on two hits.
The Yankees tied the score at 7 in the ninth on a walk to Henderson, a single by pinch hitter Butch Wynegar and a single by Don Mattingly. It was Mattingly's fourth RBI of the game.
The A's scored six runs in the sixth off a trio of Yankee pitchers to come back from a 4-1 deficit and take a 7-4 lead. Bochte led off with a single off Ed Whitson and Kingman followed with a single to left that kayoed Whitson. Dwayne Murphy greeted Brian Fisher with a solid single to right to load the bases and Henderson followed with another single to score Bochte and Kingman.
Mike Heath followed with an attempted sacrifice bunt that was mishandled by catcher Ron Hassey for an error and the bases were loaded again. Righetti came on in relief and got pinch hitter Dusty Baker to hit into a fielder's choice that cut down Murphy at the plate. However, Alfredo Griffin followed with a triple that gave the A's a 6-4 lead. Griffin scored when Righetti uncorked a wild pitch.
In the seventh, the Yankees scored twice on a walk to Bobby Meacham and a home run by Mattingly.