St. Mary's (2-5) nailed 11 three-pointers, and twice led by 19 points in the first half.
During the second half, the lead was 69-50 with 5:14 left, but the Bearcats (3-4) went on a 19-5 run to cut the deficit to five (74-69) with 55 seconds.
St. Mary's held off the rally in the final seconds by hitting four-of-six free throws to clinch the 79-72 victory.
Tyson Lesesne (Edgewood, MD/Edgewood) led the visitors with 16 points, six rebounds, four assists, and three steals. Alex Irmer (Alexandria, VA/Wakefield) recorded a double-double with 14 points and 10 rebounds.
George Kunkel (Glendale, N.Y./Archbishop Molloy) led all Bearcats in scoring with 22 points and 12 rebounds. He singlehandledly kept the Bearcats in the game with 19 points at the intermission.
Men's basketball will play their last game before final exams break on Monday night with a non-conference home game against Ramapo. Tip off in the ARC Arena is scheduled for 8:00 p.m.