T.R. Sullivan reports that the Rangers have activated Ron Mahay from the disabled list, and optioned Scott Feldman to AAA to make room for him.
I think Mahay's rehab stint was almost up -- a pitcher can only stay in the minors for 30 days on a rehab stint without being activated -- and I know the Rangers would prefer to have two lefties in the pen, so this isn't that surprising.
Plus, given that Mahay was originally a positional player, the Rangers may have decided they wanted a pitcher who could swing the bat a little for the series in Cincy.