Saint Francis let a 24-14 fourth-quarter lead slip away and Robert Morris shocked the crowd at Bishop D'Arcy Stadium with a 28-24 victory.
"We didn't get it done on offense (and) we didn't get it done on defense,” Cougar coach Kevin Donley said in a release. “You've got to live and learn and I said (to the team) 'What are you going to do now?'”
Saint Francis was hampered by injuries and ineffectiveness, as it played third-string quarterback Wesley Hunsucker after first-string thrower David Yoder (ankle injury) and Josh Miller (started the game but was pulled after a pair of interceptions) left the game. Also sidelined was former Churubusco running back Jason Nicodemus, who totaled 82 yards gained before suffering an ankle injury.
The Cougars (5-2, 2-1 MSFA MEL) allowed the Eagles (6-3, 2-2 MSFA MEL) to score 14 unanswered points late in the contest, including the game-winning touchdown with 33 seconds remaining.
Saint Francis' final series included three incomplete passes and an interception on the final play.
"Coach said it's on him,” Hunsucker said. “But it's on us, our leaders, and we can't let it happen again.”
The Cougars had gone 5-1 against ranked opposition through this season, but along with the injuries Saturday, they also missed opportunities.
"We were flat,” Cougar wide receiver Aaron Knight said. “We had a lot of dropped balls and some interceptions. We're capable of better than that.”
Hunsucker threw for three scores, 207 yards and was 17 of 30 passing before the lone interception.
Yoder finished the day going 7 of 13 with a pair of interceptions and 62 yards.
Matt Noll led USF receivers with 85 yards on nine receptions.
Hunsucker's three touchdown passes went to former Snider standout Akiem Kelsaw (a 12-yard grab), Knight (a 19-yard catch) and former Bishop Dwenger athlete Cam Smith (a 40-yard score).
Former Bishop Dwenger kicker Emerson Ueber booted a 31-yard field goal, the 18th of his career.
Saint Francis will host Concordia University (Mich.) at noon Saturday.