Stetson had a 19-2 run in the first 5:13 of the second half, erasing 17 from the 47-21 halftime margin and making it 49-40 on Luke Doyle's 3-pointer. But the Hatters got no closer the rest of the way.
Haanif Cheatham scored 13 points and Henry Ellenson added 12 points and 11 rebounds for the Golden Eagles (14-7, 3-5 Big East). Luke Fischer and Duane Wilson added 10 points each.
Marquette led 24-2 at the 10-minute mark as Stetson (8-14, 2-4 Atlantic Sun) opened the first half making 1 of 13 from the field.
Derick Newton led Stetson with 15 points. Brian Pegg had 13 points and 12 rebounds and Divine Myles scored 12.