Whalen was optioned to Triple-A Tacoma on Sunday, Shannon Drayer of 710 ESPN Seattle reports.

Whalen tossed two scoreless innings in Saturday's loss to the Rangers, so his demotion to the minors has less to do with his performance than it does the Mariners' desire to get a fresher arm in the bullpen. Max Povse was added to the active roster to assume Whalen's role as the club's long reliever.

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