Ramirez was optioned to Triple-A Tacoma on Thursday.
Ramirez has been with the big-league club since late June and pitched on four occasions since. In that span, he worked 5.1 frames and delivered a solid 3.38 ERA and 0.94 WHIP. Ramirez will likely be in consideration for a promotion if the Mariners are in need of extra bullpen arms later in the season.