OAKLAND, Calif. — The Seattle Mariners are hardly hitting the way they’d like to be in late September chasing a long-overdue, elusive playoff berth.

Luis Castillo got knocked out in the fifth inning and the contending Mariners managed just one hit, falling to the Oakland Athletics 4-1 on Tuesday night.

Carlos Santana’s infield single in the second inning was all the Mariners could muster at the plate against JP Sears (6-2) and four relievers.

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