Josh Reddick homered and drove in four runs to cap a big series for Oakland, Jed Lowrie and Eric Sogard also went deep and the Athletics beat the Kansas City Royals 10-4 on Sunday.
A.J. Griffin (7-6) rebounded from a miserable start against the Cubs to go five innings for the A's.
The only damage he allowed came on solo homers by George Kottaras and Alex Gordon.
Jesse Chavez earned his first career save with four scoreless innings of relief.
Luis Mendoza (2-5) allowed five runs in the second inning for the Royals, and was yanked to a round of boos after retiring just four batters.
It was the right-hander's shortest start in exactly five years - since an outing on July 7, 2008, when he was still with Texas.