Hisashi Iwakuma, making his first start since April 20, yielded five runs in five innings in Monday's 12-5 loss to the Tigers.
Logan Morrison went 1-for-4 with a three-run home run as the Mariners dropped Monday's contest against the Tigers.
Mariners released INF/OF Willie Bloomquist.
Mariners optioned OF James Jones to Triple-A Tacoma.
Mariners activated RHP Hisashi Iwakuma from the 15-day disabled list.
According to Mariners manager Lloyd McClendon, there will be "no restrictions" on Hisashi Iwakuma (lat) when he returns to start against the Tigers on Monday.
Robinson Cano expects to be in the Mariners lineup on Monday after getting hit by a pitch on his ankle in Sunday's game.
Fernando Rodney earned his 16th save of the season in Sunday's win over the A's, despite allowing a hit and a walk in the scoreless ninth.
Mike Montgomery continued to pitch well in Sunday's win over the A's, surrendering one run on six hits over 5 2/3 innings.
Mariners sent OF Julio Morban outright to Double-A Jackson.
Mike Zunino is not in the Mariners starting lineup on Saturday.
Mariners reinstated LHP David Rollins from the restricted list.
Mariners recalled RHP Mayckol Guaipe from Triple-A Tacoma.
Mariners recalled OF James Jones from Triple-A Tacoma.
Hisashi Iwakuma (lat) will rejoin the Mariners rotation on Monday against the Tigers.