Kendall Gray scored 17 points to push Delaware State to 3-0 this season.
Wagner’s Jonathon Williams made a layup as time expired to tie the game at 66-all in regulation.
Gray also accumulated 8 blocks and 7 assists for the Hornets.
Also scoring in double figures were Justin May with 14 points and Tahj Tate with 13.
Williams led Wagner (0-1) with 19 points, Kenneth Ortiz and Latif Rivers had 12 apiece, and Naofall Folahan scored 11.
Wagner led 69-66 with 2:32 to go in the overtime on Orlando Parker’s free throw, but that would be the final point for the Seahawks. Tate’s layup pulled the Hornets to 69-68, and Tyshawn Bell made a 3-pointer with 59 seconds remaining in the game to put Delaware State ahead for good.