White signed a minor-league contract with the Mariners on Saturday.
White struggled to find his footing in the minors last year, posting a 7.24 ERA and 1.90 WHIP across 32.1 innings with Detroit's Triple-A affiliate before being released by the club in July. He'll get a chance to redeem himself with the Mariners, though he will most likely be used as bullpen depth at Triple-A Tacoma.