Montas (forearm) is listed as the scheduled starter for Tuesday's game against the Diamondbacks in Cincinnati.
Montas, who has been on the 15-day injured list since April 22, threw a couple of bullpen sessions last week. The Reds apparently saw enough from Montas in those throwing sessions to have him avoid a minor-league rehab stint and slot right back into the big-league rotation for the series opener versus Arizona.