Manzanares and Stuart were part of an unusual swing of 12 points in 32 seconds that sparked a breakaway for the Aggies (4-7, 4-3 Big Sky). Stuart had booted the second of his career-best four field goals -- a 29-yarder -- to start the second quarter and break a 3-3 tie. North Dakota's Greg Hardin fumbled the ensuing kickoff in the end zone and in the confusion the ball came out of the end zone and was batted back in for a UC Davis safety.
Manzanares then scored the first of his TDs, boosting the lead to 15-3.
Miami has lost running back Gus Edwards for the entire season because of a left foot injury.
Virginia Tech will wear a decal on its helmets against No. 1 Ohio State on Monday night to honor slain Roanoke television journalists Alison Parker and Adam Ward.
South Carolina football players will wear stickers on their helmets this season to honor the nine people who died in a shooting at Emanuel AME Church in Charleston this past June.
Washington has found its starting quarterback, but coach Chris Petersen said the Huskies will keep that information under wraps until Friday's season opener at No. 23 Boise State.
Joey Counts scored on a 1-yard run on fourth-and-goal with 2 seconds left to give Montana a 38-35 victory over four-time defending FCS champion North Dakota State on Saturday.
Transfer Vernon Adams will be the starting quarterback when Oregon begins its season against Eastern Washington on Sept. 5.