The Hawks (21-5, 13-2) increased their Metro Atlantic Athletic Conference lead to 3 1/2 games over idle Iona (9-5), winning for the first time on Manhattan's court after five losses, and giving coach King Rice his 100th career win.
Seaborn's 3-pointer capped a 9-0 run to give the Hawks their first lead since the 4:13 mark of the first half. The Jaspers (9-17, 4-11) could only manage a free throw after Monmouth's run, missing three 3-pointers.
Seaborn finished with 10 points, Je'lon Hornbeak 15 and Chris Brady 10 points with nine rebounds.
Neither team reached 32 percent shooting with the Jaspers making only 3 of 35 from the arc, all three by Turner.
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