Byrd had a pair of short-yardage touchdown runs and finished with 128 yards on 22 carries. Bell added 116 yards, and had an 18-yard TD run with 11 minutes left to cap the scoring.
New Mexico State fumbled the ball on its first play from scrimmage, and Ryan Agnew tossed a 2-yard pass to Daniel Bellinger two plays later for the Aztecs (3-0). Agnew was 16-of-25 passing for 106 yards.
It's just the fifth 3-0 start for San Diego State since 1978.
ISU's Kolar hauls in TD with one arm
With a defender clinging on to him, Charlie Kolar gets an arm free to reel in a 16-yard touchdown.
ISU's Nwangwu goes untouched for 47-yard TD
Kene Nwangwu rushes up the middle and takes advantage of the open field to score.
Allgeier breaks free for 42-yard BYU TD
BYU's Tyler Allgeier takes the handoff 42 yards to the house as he accelerates down the field through traffic.
Tulsa offense breaks through with 66-yard TD
In a battle of field goals, Tulsa finally scores the first touchdown of the game as Zach Smith lofts a pass to Josh Johnson for the go-ahead touchdown.
Eastern Michigan gets 1st win, 53-42 over Western Michigan
— Preston Hutchinson was 19 of 30 for 315 yards and three touchdowns and Eastern Michigan earned its first victory of the season with a 53-42 win over Western Michigan on Saturday.
Marable fights for Chanticleer TD
CJ Marable fights his way through BYU defenders to score a six-yard touchdown and put Coastal Carolina ahead early.