Ken Singleton hit a three-run homer and Gary Roenicke a two-run homer in a seven-run ninth to hand California its first loss at home in 10 games this year. It was Baltimore's first triumph on the road in eight tries.
With the score 2-2, Rick Dempsey walked with one out and pinch hitter Terry Crowley singled off loser Don Aase (3-2). Al Bumbry struck out and Rich Dauer walked to load the bases before Dan Ford singled to right for his third hit of the game.
Singleton then hit his first homer this year, and first in 57 games, to make it 7-2. John Lowenstein doubled before Roenicke hit his sixth.
Aase, who gave up seven runs and five hits in the inning, entered the game with the American League's lowest ERA, .067. Winner Ross Grimsley (1-0), who relieved Jim Palmer in the first, scattered six hits before giving way to Tim Stoddard in the ninth. It was Stoddard's first appearance of the year.
California scored its two runs off Palmer before the veteran right-hander, seeking his 250th victory, left the game because his neck had stiffened. Palmer lasted only three batters, yielding a leadoff double to Brian Downing before Reggie Jackson singled him home with the first run. Grimsley relieved and surrendered the second run on Bobby Grich's two-out single.
Eddie Murray didn't start because of a sore left hand, but played the bottom of the ninth as a defensive replacement.