Jerrelle Benimon, a 6-foot-8 junior forward, had 19 points and 13 rebounds for the Tigers (9-9, 4-1 CAA), recording his nation-leading 12th doubledouble of the season.
Devon Saddler (Aberdeen) and Jamelle Hagins each scored 16 points, and Jarvis Threatt added 12 for the Blue Hens.
Delaware (8-9, 3-1) lost to Towson for the first time in six games, including three meetings last season. The Blue Hens also ended their 10-game CAA winning streak.
Towson trailed 62-57 before Bilal Dixon, who scored 10 points, sparked the Tigers' 8-0 run with two layups, the second giving the visitors a 65-62 lead with one minute remaining.
Delaware closed to within one point on two occasions in the final minute, but Jerome Hairston made two free throws with 26 seconds remaining and Marcus Damas, who had 13 points, had two more with four seconds left.
Saddler, who pulled Delaware close on a layup with 17 seconds remaining, missed a 3-point shot at the buzzer.
UMBC 70, Hartford 57: The host Retrievers (4-14, 2-3 America East) took a 20-0 lead in the first nine minutes and went on to beat the Hawks (10-8, 3-2).
Hartford sophomore forward Mark Nwakamma led all scorers with 21 points, and Yolonzo Moore II added 19.
Holy Cross 62, Navy 47: The visiting Crusaders led most of the way.
The Midshipmen (6-12, 0-2 Patriot League) were led by Worth Smith's 17 points on 8-for-14 from the field, and they cut the lead to 49-42 with 8:02 remaining, but could get no closer.
The Crusaders (9-8, 1-1) were led by doubledoubles from Malcolm Miller and Dave Dudzinski. Miller scored 13 points and pulled down 13 rebounds, while Dudzinski had 16 points and 10 rebounds. Phil Beans added eight points for the Crusaders.
Although both teams cooled off in the second half, each shot the ball well in the first 20 minutes, with the Crusaders opening the game making their first six shots while shooting 58 percent (11-for-19) in the first half. Navy also shot the ball well, making 50 percent (11-for-22).
Smith led the Midshipmen with seven points in the first half. Tilman Dunbar added five points and five assists on his way to 12 points overall.
Franklin & Marshall 76, Johns Hopkins 71, 2OT: The host Blue Jays (9-7, 5-4 Centennial Conference) got outscored by the Diplomats (13-3, 8-1) in the second overtime 14-9.
Tied at 62 in the second overtime, Franklin & Marshall scored back-to-back to take a four-point lead after one minute. George Bugarinovic made a 3-pointer to close within one. After trading baskets, Franklin & Marshall went up 72-69 on free throws from Brandon Beckford. The Diplomats built a five-point lead over the final 30 seconds.
Jimmy Hammer finished with a career-high 21 points for Hopkins.
Stevenson 76, Elizabethtown 68: Brett Burrier (Winters Mill) had a game-high 25 points to power the host Mustangs (9-6, 3-6 Middle Atlantic Conference) past the Blue Jays (4-10, 2-7).
Stevenson led 43-36 at the break.
Washington College 70, Ursinus 68: Stephen Poarch made two free throws with less than 20 seconds to play to hold off a late rally by the Bears (6-10, 4-5 Centennial Conference). The host Shoremen (2-14, 2-7) led by as many as 14 points in the second half before Ursinus tied the score with 1:18 left.
Hood 64, Lebanon Valley 55: Cameron Cook (Calvert Hall) had 20 points to lead the host Blazers (10-5, 4-4 Commonwealth Conference) past the Flying Dutchmen (7-9, 4-5).
Hood led by as many as 11 in the second half.
St. Mary's 58, Mary Washington 54: The visiting Seahawks (14-2, 3-1 Capital Athletic Conference) broke a 29-29 halftime tie by outscoring the Eagles (7-8, 1-3) by four in the second half.
Nick Laguerre had 16 points for St. Mary's.
Swarthmore 75, McDaniel 71, OT: The visiting Garnet (4-12, 3-6 Centennial) scored five straight points late in overtime to win.
Evan Pupelis led the Green Terror (10-6, 4-5) with a season high-tying 17 points, hitting all seven of his free throws.
McDaniel's Nic Martin drove the lane to tie the game at 63 with 12.3 seconds left to force overtime..
Juniata 60, Goucher 54: After the host Gophers (5-10, 3-2 Landmark Conference) took their first lead of the game late in the second half, the Eagles (11-5, 3-2) closed on a 21-8 run to win.
Richard Harris had 15 points for Goucher.