Montgomery will serve as the opening pitcher in Game 2 of Saturday's doubleheader against Cleveland, Alex Stumpf of MLB.com reports.
Montgomery will receive his fifth opening assignment of the season after giving up just two earned runs over 8.1 innings across his last nine outings. The 26-year-old southpaw has never completed two full innings in an appearance this season, so he'll likely secure just the first three outs of the game before turning things over to the Pirates' bullpen.