Sellers' shot dropped as time expired to give the Terps the win.
Diamond Miller, Brinae Alexander and Abby Meyers each had four fouls in the blowout loss.
Miller became the first player with a 30-point, 10-rebound, five-assist game since Alyssa Thomas in 2013.
The Terps went 2-1 at the Fort Myers Tip-Off over the Thanksgiving holiday.
The Terps rebounded from a loss to DePaul on Friday with a win over the Tigers.
The Terps won their first matchup over a ranked opponent this year by defeating the No. 17 Bears.
The Terps committed a season-high 21 giveaways, but held a healthy advantage over the Wildcats throughout the second half.
The Terps gave up multiple Fordham runs, but the return of Diamond Miller helped salvage a close win.
The Terps only had one player score over 10 points in the loss.
The Terps host the defending national champion Gamecocks Friday in College Park.