Erik Swanson and three relievers combined for a two-hitter as the Mariners blasted the Indians 10-0 in Cleveland.
Jay Bruce belted a grand slam in the first inning, Mitch Haniger had a solo shot in the second and Edwin Encarnacion hit a two-run homer in the fourth for Seattle.
Braden Bishop capped the scoring with a two-run single in the fifth for the M’s, who snapped a six-game losing streak.
Swanson improved to 1-and-3 with the win after allowing just one hit and three walks over six innings.
Cody Anderson suffered the loss for the Tribe. Jose Ramirez had both hits in defeat.