The Warhawks (3-6, 2-3 Sun Belt Conference) took a 25-24 lead with 12:47 remaining in the fourth quarter when Radi Jabour made a 48-yard field goal.
Troy (5-3, 4-1) regained the lead at 30-25 with 4:58 left in the game when Levi Brown connected with DuJuan Harris on a 29-yard passing score. Harris finished with 143 yards rushing on 20 carries, including a 45-yard rushing score in the third quarter.
But Louisiana-Monroe used a nine-play, 72-yard drive, capped by Revell game-winning touchdown pass to McCoy, who finished with two catches for four yards.
Revell completed all five of his passes for 44 yards the Warhawks. Kinsmon Lancaster completed 15 of 26 passes for 125 yards two touchdowns and one interception.
Brown also threw for 221 yards, two touchdown passes in the first half and an interception for Troy.
Florida State coach Jimbo Fisher hopes quarterback Sean Maguire is ready to go full speed by the middle of June.
Graduate transfer quarterback Davis Webb has officially joined California, giving the Golden Bears an experienced option to replace No. 1 overall NFL draft pick Jared Goff.
First-year football coach Dino Babers, hired by former Syracuse AD Mark Coyle, is on the committee that will search for Coyle's replacement.
Hugh Freeze has some major holes to fill on offense with the departures of Laremy Tunsil and Laquon Treadwell, but there is Chady Kelly and good depth.
After transferring in from Montana State, Dakota Prukop has a checklist he's working from as he prepares to compete for the Oregon job.
The destination for Week 6 of the Big 12 Ultimate Road Trip is unanimous, as all three conference reporters would head to the Red River Rivalry.