John Jaso hit a two-run homer and an RBI double for Seattle, and the Los Angeles Angels wasted a golden chance to get within one game of an AL wild-card spot with a 9-4 loss to the Mariners on Thursday.
Vernon Wells and Alberto Callaspo drove in early runs for the Angels (86-70), who had won five straight and an AL-best 16 of 23 in September before stumbling in their regular-season home finale.
Los Angeles remained stuck two games behind Oakland (88-68), which lost 9-7 at Texas, with six games to play. The Angels also fell three games back of idle Baltimore (89-67), the wild card leaders.
Hisashi Iwakuma (8-5) pitched six innings of seven-hit ball, and the Mariners avoided a series sweep by scoring six runs against the Los Angeles bullpen, which held them hitless Tuesday.