It was Leissner's ninth 20-plus game this season and his seventh double-double.
John Ogwuche matched his career high with 15 points, Darryl Stewart had 11 and Jacoby Armstrong 10 for New Hampshire (7-11, 3-1 America East), which won its first road game of the season. Camara tied his career high for rebounding as the Wildcats outrebounded UMass Lowell 44-28.
Leissner and Stewart each hit a 3-pointer during a game-opening 8-0 run and New Hampshire never trailed to win its third straight. A Leissner 3-point play gave UNH its largest lead of the half at 26-6 and it was 41-26 at halftime. UNH shot 51.9 percent in the first half, including 6 of 9 from distance.
Jahad Thomas had his fourth double-double of the season with 22 points and 11 rebounds to lead UMass Lowell (6-11, 0-4).
Aidan Igiehon, ranked No. 36 in the ESPN 100, has committed to Louisville over St. John's, Oregon and Kentucky.
How much can you discover while observing one Blue Devils workout? Plenty. Zion Williamson can be scary good and versatile, but that's not all.
Igiehon is one of the most physically imposing players in this class, a good rebounder with plenty of untapped potential.