Dayton (13-4, 1-1 Atlantic 10) bounces back after having its three-game winning streak snapped by Saint Louis in the conference opener on Saturday.
Oliver's dunk gave Dayton a 29-27 lead with 4:45 to play in the first half, and the Flyers led by three at halftime. His layup capped a 10-2 run to open the second half, giving Dayton a 49-38 lead with 16:03 to play. The Flyers led by double digits the rest of the way.
Dayton has won eight straight against Fordham.
Maryland point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.
Louisville's Chinanu Onuaku, who recently underwent a medical procedure to correct a heart rhythm issue detected during the combine, will keep his name in the NBA draft pool.
Andrew White III will return to the Nebraska men's basketball team next season after removing his name from the NBA draft.