The Texas Rangers have optioned Kumar Rocker to Triple-A and activated Chris Martin from the 15-day IL in a significant roster shakeup.

The Texas Rangers activated right-hander Chris Martin from the 15-day injured list on Thursday after he missed the last 14 games due to right shoulder fatigue. In a corresponding move, the Rangers optioned rookie right-hander Kumar Rocker to Triple-A Round Rock.

Martin had been the Rangers’ primary eighth inning reliever before the injury. In his absence, Robert Garcia has stepped into a higher leverage role. Garcia has two of the Rangers’ three saves since Martin was hurt. Luke Jackson, who had the bulk of the early save opportunities, has been moved into more of a middle-innings role.