LORETTO, Pa. (AP) _ Ryan Zimpleman scored two fourth quarter touchdowns to lead Butler to a 21-7 comeback over St. Francis, Pa. on Saturday.

Zimpleman, who finished the game with 198 yards on 19 carries, ran for 161 yards in the second half and scored twice to rally Butler (2-1) from a 7-0 deficit.

Butler marched 80 yards on 6 plays early in the fourth quarter and scored on a 17-yard run by Zimpleman with 11:48 left, but the extra point attempt by Mario Neto Brocchi failed. St. Francis (0-3) still held a 7-6 lead.

Butler took the lead on its next possession with a 66-yard run by Zimpleman with 8:43 left. Bulldog quarterback DeWayne Ewing then connected with Ryan Goad on the two-point conversion.

Ewing completed 16 of 33 passes for 165 yards.

Dale Jennings capped the scoring for Butler, with a 17-yard touchdown run with 6:43 remaining.

St. Francis opened the scoring with a 16-play, 62-yard drive in the second quarter that ended with David Stone's 6-yard touchdown pass to Matt Smochek.

Freshman Wes Clemons rushed for 129 yards on 30 carries.