Wagner (7-3) took a 14-3 lead when Dominique Williams rushed 5-yards for the score. Williams finished with 173 yards on 22 carries.
Eddie Houghton answered for Holy Cross (1-9), running it in from 3 yards out with 36 seconds left in the first half. Wagner led at halftime 14-10.
With Wagner trailing 30-17 in the fourth quarter, Doscher took over. Doscher found Williams for a 10-yard touchdown with 7:09 remaining, cutting the lead to 30-24.
On Holy Cross' next possession, Jarrett Dieudonne forced Steven Elder to fumble, setting up the winning drive.
Doscher completed the comeback finding Morgan for the 4-yard touchdown and the win.
Will Grier threw four touchdown passes to four receivers -- all in the first half -- and No. 25 Florida downed third-ranked Mississippi 38-10 on Saturday night.
Leonard Fournette highlighted his SEC-record third straight 200-yard game with a 75-yard touchdown run, and No. 9 LSU overcame Eastern Michigan 44-22 on Saturday night.
An officiating error led to an Oklahoma State touchdown Saturday in the Cowboys' 36-34 win over Kansas State.
Texas A&M receiver Ricky Seals-Jones, who was ejected for targeting midway in the second quarter of Saturday's game, took to Twitter late in the game, retweeting a tweet that questioned the call.
Florida State running back Dalvin Cook exited in the first quarter of the Seminoles' 24-16 win over Wake Forest with a left hamstring injury. He is day-to-day.
As if things weren't going bad enough at Texas, the Longhorns appear to have players on Twitter during lopsided losses and jabs at their coach accidentally being sent from other nearby teams.