Moreta was recalled from Triple-A Louisville on Thursday.
Moreta was sent down by the Reds in early August, and he's posted a 6.00 ERA and 1.67 WHIP in six innings over six relief appearances in the minors following his demotion. However, he'll rejoin the major-league bullpen after T.J. Zeuch (back) was placed on the 15-day injured list Thursday.