Bentley, who entered with a nation-leading five touchdowns, finished with 104 yards rushing on just six carries. TJ McDaniel added 104 yards on the ground for SMU (3-0). Terrance Gipson and TaMerik Williams each had a touchdown run in the fourth quarter.
Bentley scored the first time he touched the ball, running for 33 yards after catching Buechele's screen pass, capping the Mustangs' opening drive. Bentley added a 13-yard TD run that made it 36-0 with 9:36 left in the third quarter.
Trae Self completed 14 of 23 passes for 133 yards and ran for a 6-yard touchdown for Stephen F. Austin (0-3).
Capacity was limited to 25% at 32,000-seat Gerald J. Ford Stadium. Face masks were required and tailgating was prohibited.
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