OAKLAND -- Dan Haren worked ahead in eight efficient innings. He struck out six and walked one.
Oakland bats can't back Haren
Still, that wasn't enough for the Athletics' All-Star and ace to earn his career-best 15th win -- failing to reach that mark on his fifth attempt, and 27th birthday.
Jose Lopez hit a three-run homer and Miguel Batista outpitched Haren to end a five-start winless stretch in the Seattle Mariners' 4-0 victory over Oakland on Monday night.
The defending AL West champion A's were eliminated from the wild-card race with the New York Yankees' 8-5 win over Baltimore.
Yuniesky Betancourt drove in Seattle's first run and had the first hit off Haren (14-8), who dropped his fourth consecutive decision.
"That's very encouraging," Haren said. "I'm trying to get better. My arm feels great, which is great after 200-plus innings. I have a couple starts left, and I'm going to try to make the most of them."
Ryan Rowland-Smith recorded five outs and Brandon Morrow finished the seven-hitter for Seattle's 11th shutout of the season. It marked the ninth time the A's were blanked, four by the Mariners.
Batista (14-11) struck out six in 6 1/3 scoreless innings, allowing five hits and walking four.