"It's hard to do anything but beat it into the ground," A's designated hitter Scott Hatteberg said.
That's just what Hatteberg and crew did -- and the A's lost the AL wild-card lead and their seven-game losing streak.
"The sinker was working really well," Westbrook said. "It was just a matter of getting them to hit it on the ground and our defense making good plays."
Jeff Liefer hit an RBI double in the second inning for Cleveland only hours after being brought up from Triple-A Buffalo, and the Indians defeated the A's for the fourth time in five meetings this year.
Westbrook (8-12) beat the Royals last Thursday to end a three-game losing streak, then held Oakland's streaking offense in check a day after the A's pounded out 14 hits in a 13-4 win.
He hasn't allowed a run in 14 innings. Manager Eric Wedge considered letting Westbrook go the distance, but opted instead to use his bullpen -- which owns the lowest relief ERA in the league.
"I made some adjustments, and I've been going off that ever since," said Westbrook, who settled down after allowing a leadoff double to Eric Chavez in the second.
The Indians turned double plays in the fourth and fifth innings and Westbrook faced the minimum in the first, third, fifth, sixth and seventh innings. Bob Wickman allowed consecutive singles to open the ninth before recovering for his 25th save in 28 opportunities.
The A's were trying to match their longest winning streak of the season, but instead fell behind the New York Yankees for the AL wild-card lead after briefly going ahead with Monday's 13-4 victory. Oakland lost for only the third time in 13 games since the All-Star break.
"You can't be perfect every night," A's manager Ken Macha said. "It's not that easy."
Westbrook had struggled against the A's before this season. He beat Oakland 6-2 on May 29, giving him a 1-5 record and a 5.01 ERA vs. the A's in seven career starts coming into this outing.
He allowed two hits over seven innings, struck out two and walked one in Cleveland's sixth shutout of the season.
After winning five of his six starts in June, Blanton (5-9) is winless in four outings this month.
"I've thrown the same as I have the whole month," he said. "Some teams hit you better than others."
Blanton needed only six pitches to retire the side in order in the fifth and nine in a 1-2-3 seventh. He gave way to Jay Witasick in the eighth after allowing three hits and striking out seven with four walks.
"It was a shame either pitcher had to lose that game," Macha said. "Both guys pitched extremely well."
Witasick immediately gave up Sizemore's 10th homer of the year, a shot to right. Crisp followed with a walk and fans began to boo Witasick, acquired July 13 in the trade with Colorado that sent popular outfielder Eric Byrnes to the Rockies.
After allowing two walks in the second, Blanton was visited at the mound by trainer Larry Davis and Macha after complaining of tightness in his back.
He then gave up the double to Liefer to make it 1-0.
"It was a good start, and it's something you can build on," Liefer said.
Macha plans to give his young pitchers extra days between starts in the coming weeks to preserve their arms for the stretch run.
Oakland's Mark Ellis went 0-for-4 and had his nine-game hitting streak snapped.
- Wickman earned his 104th career save to move into a tie with Jose Mesa for second place in club history, 25 shy of Doug Jones' franchise record.
- The A's were shut out for the eighth time this year.
- Jay Payton is hitless in his past 15 at-bats for Oakland.
- The Indians placed DH Travis Hafner on the DL retroactive to July 17. Hafner has been having dizzy spells since being hit in the face by a pitch from Mark Buehrle of the Chicago White Sox on July 16. He did some light running Tuesday, then was set to travel home to Cleveland. He will be evaluated by team doctors in the coming days and work out at Jacobs Field.
- A's CF Mark Kotsay missed his second consecutive game with a stiff back. The A's might also give him Wednesday off and they have an off day Thursday, so he would have plenty of time to recover.