Campbell led 30-25 at intermission. McCarter hit back-to-back treys to open the second half, sparking a 12-4 run, and Winthrop could get no closer than nine points the rest of the way. Curtis Phillips converted two at the line, Quinton Ray made a layup and McCarter split a pair of free throws for a 19-point advantage with 2:50 left, the largest of the contest.
McCarter finished with 17 points and Ryan had 14 for the Camels (10-20, 4-13 Big South). Ray added a career-high 11 points while Phillips chipped in 10 with 10 rebounds.
Keon Moore scored 16 points to lead Winthrop. The Eagles (16-12, 11-6) shot 2 of 17 from distance and 37.7 percent overall as they dropped to fifth place in Big South standings.