OAKLAND Josh Donaldson homered with one out in the 12th inning, lifting the A's to a 4-3 victory over the Detroit Tigers Friday night their ninth straight win.
Donaldson's opposite-field drive to right off Brayan Villarreal (0-2) was his first career game-ending hit.
And in typical 2012 fashion for the reigning American League West champions, Josh Reddick found Donaldson with two celebratory whipped cream pies a scene reminiscent of the major league-best 14 walk-off wins the A's had last year.
Ramon Santiago hit a two-out triple in the top of the 12th before Chris Resop (1-0) relieved Jerry Blevins and retired Austin Jackson on a fly to center.
The A's improved to an A.L.-best 9-2, just the third time in Oakland history the club has opened at least 9-2, also done in 1981 (11-0) and 1990 (9-2).
Only the Atlanta Braves at 9-1 have a better record than Oakland.
Note A's second baseman Scott Sizemore is scheduled for a second reconstructive surgery on his left knee Tuesday, another blow for the infielder and reigning A.L. West champions after he missed last season.
Sizemore will meet with Dr. James Andrews in Pensacola, Fla., on Monday, then have surgery to repair the torn ACL. Sizemore, 28, was hurt 14 months ago during the first full-squad workout of spring training.