Saint Francis sophomore Josh Hogan chipped in with 14 points in his third collegiate start, while Ethan Hussey added 13 in the victory.
Saint Francis (13-7, 5-3 Crossroads League) climbed into a three-way tie for third in the league with Grace (13-6, 5-3) and Taylor.
Sixth-ranked Indiana Wesleyan University, USF's next opponent on Tuesday night at 5 p.m. in Marion, beat Bethel 81-65 on Saturday and is tied atop the league standings with the Pilots. It was Bethel's first loss after seven consecutive wins ins in conference play.
After trailing 38-37 at halftime, the Cougars outscored the Lancers 37-31 in the second half and limited Grace C to 38.7 percent shooting in the final 20 minutes. Grace was 12-for-31 shooting in the second half.