HOUSTON -- Oakland right-hander Bartolo Colon pitched seven shutout innings and the Athletics completed a three-game series sweep of the Houston Astros with a 6-2 victory on Sunday at Minute Maid Park.
Colon (5-2) was customarily stingy with the free passes, completing his seventh start this season without issuing a walk. Colon, who set a season high with nine strikeouts, has walked four batters in 61 1/3 innings. He allowed nine hits, all singles, and only two runners to reach third base.
After sending eight batters to the plate in the first inning on Friday night and 11 to the dish in their six-run second inning on Saturday night, the Athletics (28-23) scored five runs and batted around in the fourth inning of the series finale.
The first five batters reached base against Astros left-hander Dallas Keuchel (1-2), with Josh Donaldson, Seth Smith, Nate Freiman and Coco Crisp delivering run-scoring base hits.
In the sixth, Freiman added a solo home run. Eighteen of the Athletics' last 19 home runs have come with the bases empty, the lone exception a winning three-run blast from Chris Young in the opener.
Colon, who turned 40 on Friday and became the fourth Oakland pitcher in franchise history to make a start at that age, continued a recent run of excellence by Athletics starters. In the last 10 games, Athletics starters are 5-1 with a 2.87 ERA with a .236 opponents' batting average.
The Astros (14-36) suffered their third consecutive series sweep by Oakland. They have been outscored 68-31 in nine meetings this season and on Sunday wasted the first four-hit game in Jason Castro's career.
Castro, who walked as a pinch hitter on Friday, has at least three hits in his last three starts at catcher and as the designated hitter, and is 10 for 12 with four RBIs and four runs during that span.
NOTES: The Athletics have won 11 consecutive games against the Astros, tied for the third-longest streak against one opponent in franchise history. Oakland defeated the Chicago White Sox 11 consecutive times between June 20-Sept. 7, 1970. ... Before surrendering six runs (four earned), nine hits and one walk in six innings on Sunday, Keuchel posted a 1.50 ERA in two relief appearances against Oakland this season. ... Young finished 0 for 5 and had his 16-game hitting streak at Minute Maid Park come to an end.