Tyreece White blocked Sam Webster's 40-yard field goal attempt with 5:03 remaining to help seal it for the Wildcats.
Davidson (8-3, 6-2) and Dayton (8-3, 6-2) entered trailing St. Thomas (Minn.), which finished the league 8-0. It's just the second season for the Tommies at the Division I level and they're ineligible for the playoffs.
Williams had a 3-yard touchdown run in the first quarter and his 75-yard burst up the middle and into the end zone tied the game 17-17 with 7:19 remaining in the third quarter. Jayden Waddell's 35-yard touchdown pass to Maxwell Weaver stretched the Wildcats' lead to 24-17 about four minutes later.
Shane Hamm ran for a 17-yard touchdown to end a long scoring drive for Dayton that capped the scoring with 14:18 remaining, but Sam Webster missed the PAT. The Flyers last possession ended with an incomplete pass on fourth-and-6 at their 32-yard line.
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