Trevathan, who was named Orlando Sentinel's Defensive Player of the Year following his senior season at Leesburg, picked off a Joe Flacco pass and returned it to the end zone for a score.
Only the Broncos linebacker didn't get the touchdown.
Trevathan started celebrating a bit early, dropping the ball at the one as he continued through the end zone. The ball eventually went out of bounds and the Ravens took the ball over at their 20.
Baltimore scored a touchdown on their next drive to pull within 42-24, making Trevathan's gaffe a 14-point swing.