Pagan was optioned to Triple-A Tacoma on Monday.
Pagan was sent back to Tacoma after making just one appearance for the big club, striking out five batters through four scoreless innings of relief Sunday. He's looked strong in his last two relief outings for the Mariners (eight innings of one-hit ball), so he'll likely be back in the majors once the big club needs another bullpen arm. In the meantime, fellow reliever Casey Lawrence was recalled from Triple-A.