Coco Crisp and Yoenis Cespedes homered, and Dan Straily picked up his first major league victory as the Oakland Athletics beat the Kansas City Royals 3-0 on Thursday night.

Crisp, who played for the Royals in 2009, was 2 for 27 this season against Kansas City before the home run.

Crisp drilled a 2-0 pitch from Luke Hochevar deep to right. The ball hit high off a green wall beyond the fence and caromed back onto the field. It was first ruled a double, but manager Bob Melvin disputed that. After the umpires viewed replays, it was changed to a home run.

Straily (1-0), a 24th-round draft pick in 2009, held the Royals to three singles over 6 1-3 innings in his third major league start. Straily, who walked two and struck out two, pitched out of a bases loaded jam in the second inning.

Hochevar (7-11) gave up three runs and four hits in seven-plus innings. Hochevar is 0-8 with a 6.52 ERA in nine career starts against Oakland.

The A's had only a bunt single in the fourth inning by Josh Reddick before Crisp's home run.

The Royals loaded the bases on a single by Salvador Perez and walks to Mike Moustakas and Eric Hosmer. Chris Getz grounded out to first baseman Chris Carter to end the inning.

Cespedes, who is hitting .368 since the All-Star break, hit his 15th home run on an 0-2 pitch from Hochevar in the seventh.

The Royals loaded the bases again in the seventh with singles by Billy Butler, Moustakas and Hosmer. Jerry Blevins, the third Oakland pitcher of the inning, retired Getz on a fly ball to shallow center on the first pitch.

Grant Balfour worked a spotless ninth to log his ninth save in 11 opportunities.

The A's added a run in the eighth when Jemile Weeks' two-out single scored Derek Norris, who led off the inning with a single and stole second.