Callis anchored three defensive shutout victories put together by the Trojans that started on Monday.
TNU blanked three opponents, King, Alderson Broaddus and Davis & Elkins, by a combined score of 6-0 and contributed a goal to help the cause.
The Trojans moved into solo possession of second place in the G-MAC standings with 12 points, trailing league leader Ursuline by just one point. TNU stopped a red-hot Davis & Elkins program on Saturday and stifled a tough Alderson Broaddus squad earlier in the week that would beat Kentucky Wesleyan in double overtime.