Marcus Stout scored 15 of his 19 points in the second half and Bryant Dunston added 18 for Fordham, which dropped its third game in a row.
Saint Joseph's led 39-25 at halftime thanks to 64 percent shooting, and the Rams never got closer than eight the rest of the way. They cut the lead to 46-38 on a 3-pointer by Stout with 12:52 left. But the Hawks responded with five straight points for a 51-38 lead.
Fordham pulled within 12 points, 57-45, on a basket by Stout with 8:05 remaining before Saint Joseph's pulled away.
The Hawks shot 51 percent from the field, including 8-of-15 from 3-point territory. Fordham hit 37 percent of its shots and was just 3-of-21 on 3-pointers.
