Ramirez was recalled from Triple-A Tacoma on Thursday.
Ramirez was sent to the minors July 22, but he'll rejoin the major-league bullpen to provide a fresh arm while Paul Sewald is on the paternity list. The right-hander has recorded a 4.35 ERA and 0.87 WHIP in 10.1 innings across seven relief appearances with the Mariners this year.