The expected roster move was made official on Tuesday, with Ramirez schedule to make his second start of the season Tuesday night. Ramirez was recalled from Single-A Everett, where he was sent so he could make a start during the All-Star break on normal rest.
The Mariners sent reliever Bobby LaFromboise to Triple-A Tacoma to clear a roster spot.
Ramirez's only start came on July 11 against Boston when he gave up seven earned runs in 4 2-3 innings. In his one start at Single-A, Ramirez went 5 1-3 innings and allowed one earned run.