Jon Lester pitched six strong innings and Josh Donaldson homered twice and drove in four runs as the Oakland Athletics beat Kansas City 11-3 Tuesday night, snapping the Royals' eight-game winning streak.
Lester (13-7) has won all three of his start since the A's acquired him in July 31 trade for All-Star outfielder Yoenis Cespedes. Lester struck out nine and allowed three runs on six hits and two walks.
The Royals have won 11 of 13 with both losses to Lester, who is 9-3 with a 1.84 ERA in 13 career starts against Kansas City.
Donaldson homered in the seventh and eighth off left-hander Bruce Chen for his third multi-homer game of the season.
Royals starter Jeremy Guthrie (8-10) allowed six runs on 11 hits in 4 2-3 innings.