OAKLAND, Calif. - That three-game sweep of the Royals earlier in the week?

Never mind.

The Yankees came West after that three-game surge against the American League's top team and laid an egg against the worst the league has to offer.

Sunday it was a no-show by the offense in a 3-0 loss to the A's in front of 25,457 at O.co Coliseum that allowed Oakland to take three of four in the series.

Now it's on to Seattle for the Yankees and a Monday night matchup against Felix Hernandez, so far pitching his way to another Cy Young Award.

The Yankees (26-25) made Oakland righthander Jesse Chavez at times look like King Felix Sunday afternoon. Chavez, who came in a misleading 1-5 -- his ERA was 2.44 -- allowed seven hits over eight shutout innings. The Bombers didn't have many chances against Chavez, who struck out six and walked none, going 0-for-3 with runners in scoring position and stranding five.

Adam Warren made it five straight solid starts, shutting out the A's (20-33) over 51/3 innings before Stephen Vogt lofted a towering two-run homer just over the wall in right for a 2-0 lead. Warren allowed those two runs, six hits and one walk over seven innings. He struck out four.

The A's pushed across an insurance run in the eighth before Tyler Clippard came on for the ninth. He allowed Alex Rodriguez's second hit of the day that left the DH 14 shy of 3,000 for his career, and walked Carlos Beltran with one out. Joe Girardi sent up Brian McCann, 11 for his last 33 coming in, to pinch-hit for Ramon Flores. Clippard struck out McCann and retired Garrett Jones, pinch-hitting for John Ryan Murphy, on a foul pop to record his seventh save.

The Yankees failed to come through on a scoring chance in the first. Chase Headley improved to 11 for his last 28 with a one-out single and A-Rod made it 2,985 career hits with a single to left. Chavez recovered, striking out Mark Teixeira and getting Carlos Beltran, who came in with at least one hit in 17 of his last 18 games, to ground to second to end the 25-pitch inning.

Teixeira's glove helped Warren in the bottom half. Billy Burns chopped Warren's first pitch of the day, a 91-mph fastball over Headley's head for a single and Ben Zobrist followed with a ground smash that appeared headed for right. But Teixeira made a diving stop to his right and flipped to Warren for the first out. Warren retired Stephen Vogt and Billy Butler on fly balls to center to end the inning.

Teixeira's glove work again assisted Warren in the fourth. Billy Butler led off with a single and Josh Reddick, who has hit the ball hard all series, followed by hitting a seed right at Teixeira. The first baseman stabbed the liner, then alertly tagged Butler straggling off the bag to complete a double play.

Billy Burns, a thorn much of the series, led off the sixth with a single. He stole second and third, giving him nine stolen bases this season, but for the moment stayed at third on Ben Zobrist's short fly to left. Burns scored easily as Vogt came next and belted a 1-and-1 fastball that came in belt-high out of the park for the runs that would be enough on this afternoon.