Seattle had been down an outfielder since Leonys Martin was designated for assignment last Sunday, and Mitch Haniger went on the disabled list on Wednesday. The club had previously added Ben Gamel, who has been starting in right field, and utility man Taylor Motter and designated hitter Nelson Cruz can also play in the outfield.
But with Cruz slowed by a sore hamstring, Powell adds some depth behind starters Guillermo Heredia, Jarrod Dyson and Gamel.
Powell, 24, was hitting .261 with a .