MILWAUKEE -- Greg Vaughn hit a grand slam in the ninth inning and drove in six runs yesterday as the Milwaukee Brewers, after blowing a six-run lead, beat the Oakland Athletics, 11-7, and knocked the A's out of first place in the American League West.

Vaughn, who homered twice off Dave Stewart on Saturday, also hit a two-run double. Mark McGwire homered twice and drove in four runs for Oakland, and Jose Canseco added a two-run homer.

Jim Gantner opened the ninth with a single off Gene Nelson (0-1). B.J. Surhoff bunted and was safe when Nelson's throw to second was late, and Robin Yount followed with another bunt and reached when third baseman Vance Law's throw to third was not in time.