Tyler Riddell threw for two touchdowns and Matt Clark made a game-winning 42-yard field goal as time expired to give Duquesne a 20-17 victory over Robert Morris on Saturday to end the regular season. Riddell hit Joey Isabella for a 71-yard touchdown on the Dukes' opening drive, then found Garrett Harrold from 4-yards out early in the third quarter to regain a 14-10 lead. He finished 13 of 28 for 214 yards with no interceptions.