The Mariners reinstated Vargas (lat) from the 60-day injured list Friday.
Vargas has been on the injured list all season with a strained right lat, though he was cleared to begin playing in rehab games Aug. 8 and has since fired 4.2 shutout innings between High-A Everett and Triple-A Tacoma. Now fully healthy, the 26-year-old righty will likely claim a middle-relief role with the Mariners. Nick Davila was optioned to Tacoma in a corresponding move, and Matt Brash (lat) was transferred to the 60-day IL to free up a 40-man spot.