Butt is scheduled for minor surgery on his left knee following his most recent setback, James Palmer of NFL Network reports.

EDGE Analysis

Butt returned from his third ACL tear for Saturday's preseason loss to the Rams, hauling in both of his targets for 17 yards. He apparently suffered a setback either during the game or Monday at practice, as he wasn't present Tuesday when coach Vic Fangio ruled the tight end out for Thursday's preseason finale versus Arizona. The 24-year-old now appears in danger of spending another season on injured reserve, even though his latest surgery is considered minor.