Zach Terrell passed for a career-high 445 yards and four touchdowns, helping No. 14 Western Michigan remain undefeated with a 38-0 victory over Buffalo on Saturday.
Corey Davis had 13 catches for 173 yards and two touchdowns, breaking the Mid-American Conference record for career receptions. Davis also holds the MAC records for career yards receiving and touchdown catches.
Michael Henry added six receptions for 121 yards as the Broncos (11-0, 7-0, No. 21 CFP) stayed in contention for a major bowl bid. They need a win against Toledo next week and a victory in the MAC championship to have a chance at the Cotton Bowl.
Jordan Johnson had 95 yards rushing for the Bulls (2-9, 1-6), who lost their third straight game. Grant Rohach, who filled in for injured starter Tyree Jackson, threw for 140 yards.
After a scoreless opening quarter, the Broncos controlled the action the rest of the way.
Terrell found Davis for a 22-yard touchdown with 8:16 left in the second quarter, and then passed to Jarvion Franklin for a 20-yard touchdown with 2 minutes left in the half.
The Broncos padded their lead in the third quarter on Butch Hampton's 30-yard field goal and Terrell's 65-yard touchdown pass to Henry.
Western Michigan's defense recorded its second shutout this season. The Broncos beat Akron 41-0 on Oct. 15 for their first shutout since 2006.