OAKLAND, Calif. -- Astros ace Dallas Keuchel walked in two runs and hit a batter to force in another during a shaky sixth inning, and the Oakland Athletics completed a four-game sweep of Houston with a 10-2 victory on Sunday.
The Astros entered the day tied with Cleveland for the best record in the AL, but their pitching has fallen apart at the Coliseum. Oakland rallied from behind in each of the first three games of the series, including one in which Houston's bullpen brought in five runs with bases-loaded walks.
Keuchel (12-4) never had a lead in the finale. He had allowed only two runs over 21 2/3 innings in three games against the A's this season and was doing well again until the sixth, when he lost control and labored through a 40-pitch inning.
The left-hander gave up a leadoff single to Jed Lowrie, then walked three of the next four to push in the go-ahead run. Two batters after hitting Mark Canhawith a bases-loaded pitch, Keuchel walked home another to extend Oakland's lead to 4-1 and end his day. Keuchel allowed four runs over 5 2/3 innings.
Oakland piled on against the bullpen with two runs in the seventh and four in the eighth.
Jose Altuve had two hits and J.D. Davis added a pinch-hit home run for the Astros. Houston was outscored in the four-game series 41-15.
The Astros frustrations boiled over in the fifth when Jake Marisnick was ejected for arguing balls and strikes. Marisnick struck out looking twice and was upset the second time, angrily slamming his bat and helmet to the ground before getting thrown out by home plate umpire Ramon De Jesus.
Kendall Graveman (5-4) pitched five-hit ball over six innings and allowed one run for Oakland.
Matt Chapman, Ryon Healy, Boog Powell and Matt Olson homered as the A's completed their second four-game sweep this year. It's the second time in Oakland history that the team has swept a pair of four-game series in the same season.
Astros: Right-hander Collin McHugh will skip his scheduled start Thursday because of a lingering fingernail issue on his pitching hand. Brad Peacock will pitch in McHugh's place. ... Juan Centeno is expected to miss a few days with a mild concussion after being hit in the facemask by Lowrie's swing Saturday.
Astros: RHP Justin Verlander (11-8) faces the Angels on Tuesday in his second start with Houston since being acquired from Detroit. Verlander is 6-8 lifetime against the Angels.
Athletics: Following a day off Monday, LHP Sean Manaea (10-9, 4.33 ERA) pitches against Boston in the opener of a three-game series on Tuesday.