NFL Media Insider Ian Rapoport reported that Trevathan underwent an MRI on Tuesday after suffering a left knee injury at practice. The team expects the third-year linebacker to miss six to eight weeks.
A source who spoke to Trevathan says both his ACL and MCL are fine, but the third-year defender suffered a left medial tibial impaction fracture (the bone below his knee), per a Broncos spokesman.
"The doctor told me I was going to be out four to eight weeks, but I told him four to six," Trevathan told ESPN's Josina Anderson. "I'm not tripping. I will bounce back. I'm a soldier."
It won't be easy for the Broncos to mask over the loss of Trevathan. He's an under-the-radar, three-down contributor who drapes tight ends and running backs in coverage while stuffing the run.