Mariners outfielder Michael Saunders has been placed on the 15-day disabled list with a sprain in the AC joint of his right shoulder, a day after he crashed into the outfield wall.

Seattle made the roster move Thursday before opening a four-game series against Texas. Seattle selected outfielder Endy Chavez from AAA Tacoma and designated for assignment pitcher D.J. Mitchell to clear a spot on the 40-man roster.

Saunders, of Victoria, B.C., was hurt Wednesday night in the first inning against Houston when he slammed into the right-field wall catching leadoff hitter Jose Altuve's fly ball. Saunders said he was initially concerned he may have broken his collarbone, but was relieved the injury was just a sprain.

Manager Eric Wedge said Saunders fought going on the disabled list, but the injury requires a couple weeks of rest.