Stewart, the Bearcats' top performer on defense, got hurt against Fordham but kept playing with the injury. There is no timetable for his return.
Cincinnati (No. 21 BCS, No. 21 AP) has relied heavily on Stewart for his play on the field and his senior leadership. Stewart ranks third in the Big East with five sacks and has seven tackles for loss on the season. He also has forced two fumbles.
Without Stewart, Cincinnati will rely on veteran Brandon Mills.