"We'll take what we can get from him," general manager Jon Daniels said. "For much of September, that could be as a pinch-hitter."
Catcher Carlos Corporan is also being activated off the DL. The Rangers are also calling up four players: third baseman Joey Gallo, outfielder Drew Stubbs and pitchers Luke Jackson and Ross Ohlendorf.
Tuesday is the first day that rosters can be expanded to up to 40 players. The Rangers may call up other players later in the month as needed or once Triple-A Round Rock is done with Pacific Coast League playoffs.
Stubbs gives the club an extra outfielder and a pinch-runner. That allows Texas to carry Hamilton as a pinch-hitter. Gallo can also play the outfield and the Rangers already have Shin-Soo Choo, Delino DeShields, Ryan Strausborger and Will Venable.
"We have a number of outfield options, so if we have to pinch-run for [Hamilton], we can," Daniels said.
T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, follow him on Twitter @Sullivan_Ranger and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.