The Rangers made the move before the series finale against the Chicago White Sox, after saying the previous night that Hamilton would be out about four weeks with a strained left hamstring. Left-hander Ross Detwiler was activated from the DL.
Hamilton had a game-ending, two-run double as pinch-hitter Sunday, then missed two games with tightness before an MRI. He was hitting .273 with two home runs and five RBIs.
Detwiler was activated after an injury rehabilitation assignment with Double-A Frisco. He was 0-5 in seven starts before left shoulder inflammation. He will now work out of the Rangers bullpen after being a reliever last season for Washington.