After a week of speculation, the Seattle Mariners finally acted on James Paxton's elbow injury Tuesday, as they placed the starter on the 15-day disabled list retroactive to Aug. 8 with a left elbow contusion.

Paxton sustained the injury after being drilled by a comebacker on his throwing elbow on Aug. 7. His X-rays came back negative, but the Canadian southpaw was unable to make his next start, and hasn't pitched since the incident.

Since being promoted from Triple-A Tacoma on June 1, Paxton has produced his best season in the big leagues, owning a 3.53 ERA and 73 strikeouts with just 18 walks in 81 2/3 innings.

Seattle recalled pitcher Cody Martin from Tacoma in a corresponding move.