Following today's loss in Houston, the Mariners have demoted Tyler Olson and Yoervis Medina to Triple-A Tacoma. Corresponding roster moves will be announced tomorrow, although Bob Dutton wrote that Chris Taylor and Joe Beimel could be the players recalled.
Olson has looked out of his depth since the spring ended. He walked more hitters than he struck out, and he was ineffective against both lefties and righties. Olson's awkward role might have contributed to his struggles: he's been a starter throughout his career, and he had the dual assignment of working as a long man and as a LOOGY.