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Trevathan, while fairly unknown nationally, made his presence felt in a monumental way last season.
When Von Miller was out, Trevathan answered the bell. Miller missed seven regular-season games and almost all of another one. In those games, Trevathan recorded three interceptions, two sacks and 56 tackles.
More importantly, the Broncos won all of those games.
He stabilized the linebacker position, and he will do the same thing in 2014. Without Trevathan, the Broncos would have to turn to unknowns such as Lerentee McCray, Lamin Barrow and Corey Nelson.
Denver would likely use Barrow at middle linebacker and Nate Irving, the expected starter at the position, as an outside linebacker (or the other way around).
Barrow is a fifth-round draft pick who is unproven, so sliding him into the middle linebacker role could be problematic.
Irving has never locked down the middle linebacker job—despite three years of opportunities. Having two average (at best) starters could be a major problem.
As long as the third-year Kentucky product stays healthy, he should impress. His 153 tackles (including the playoffs) and four forced fumbles show his playmaking ability, which he's ready to display once again.