The injury occurred during the 11-on-11 drills, when Trevathan went down and was quickly attended to by team personnel. The extent of the injury is unknown, but Trevathan reportedly appeared unable to put weight on his left leg. According to Jeff Howe of 7NEWS, Trevathan looked very frustrated by the injury.
A sixth round pick by the Broncos in 2012, Trevathan had a stellar second season in 2013, leading the team with 88 solo tackles. Starting every game for Denver, he accumulated 129 total tackles, three interceptions, three forced fumbles and two sacks.
Trevathan was also an integral part of Denver’s defense during their playoff run, leading the team in tackles with 24. He posted the team-high in that category in each of their postseason contests; with four in the divisional round win against the San Diego Chargers, eight (all solo) in the AFC Championship victory over the New England Patriots, and 12 in a losing effort against the Seattle Seahawks in the Super Bowl.
The 24-year-old Trevathan currently sits atop the Broncos’ depth chart at weakside linebacker. His backup is Brandon Mashall, who spent most of last season on the team's practice squad. Also listed at the position are veteran Jamar Chaney and rookie Corey Nelson.
After defeating the Seahawks in their first preseason contest on Aug. 7, the Broncos will return to action on Aug. 17 against the San Francisco 49ers .
Update: The Broncos announced Tuesday afternoon that Trevathan suffered a left medial tibial impaction fracture, and is expected to miss 6-8 weeks.