The Twins reinstated Martin (hamstring) from the injured list Thursday.
Martin landed on the injured list Aug. 17 with a strained left hamstring but has been playing in rehab games at Triple-A St. Paul since Tuesday. After going 3-for-8 with a triple, three RBI and a run scored, the 27-year-old will now return to the active roster and provide depth to Minnesota's outfield corps. Gabriel Gonzalez was optioned to Triple-A in a corresponding move.