The senior's previous best was 16 points.
Roh made 8 of 10 first-half shots and his 18 points helped Colgate hold a 46-36 lead at the break. It was the Raiders' best offensive output in Patriot League play this season.
A Moore 3-pointer gave Colgate its largest lead of the game at 18, 56-38. Army responded with a 12-3 run to pull within 59-50 midway through the half. Colgate's lead was cut to eight points with 2:47 left, but the Raiders outscored Army 11-4 down the stretch.