Steckenrider was reinstated from the restricted list Thursday.
Steckenrider missed Seattle's three-game series in Toronto while on the restricted list, an indication that he'd made himself ineligible to cross the border into Canada by declining to vaccinate himself against COVID-19. He'll return to his role as part of the Mariners' closer committee going forward, a job that has gotten him two saves despite a 4.85 ERA and 15.0 percent strikeout rate.