Dayton (6-0, 3-0 Pioneer) was one of eight FCS teams still unbeaten coming into the game, rallying from behind in four of its six wins. Saturday, the Flyers broke out of a 14-14 tie with six unanswered scoring drives - field goals of 36 and 25 yards from Will, a pair of 2-yard touchdown runs by Adams and a Ryan Schwenke 35-yard fumble return.
Dayton capitalized on four turnovers - two fumbles and two interceptions - after halftime.
Jean Rene caught TD passes of 32 and 20 yards from Ryan Clarke as Valparaiso (1-5, 1-3) rallied into a 14-14 tie early in the second quarter.
Four Flyers combined to rush for 182 yards, nearly 100 more than Valparaiso.