Mariners activated RHP Gabe Speier from the 15-day injured list.
Speier, 29, has been sidelined since the end of May with a left rotator cuff strain. Prior to landing on the shelf, he struggled badly through 22 outings — posting a 6.06 ERA, 1,47 WHIP and a 22/10 K/BB ratio over his 16 1/3 frames. Mike Baumann was designated for assignment in a corresponding move.