Matt Chapman doubled in the go-ahead run in the sixth inning to make a winner of Paul Blackburn in his first start of the season, and the Oakland Athletics beat the Kansas City Royals 4-1.

Matt Olson hit his 13th home run, Stephen Piscotty singled three times and Marcus Semien added two hits and an RBI to help the A’s to their third win in four games against the Royals over the past seven days.