I love his production, I love his attitude and I think he's a fit in the right system.
However, Trevathan does have a few problems. One is that he's definitely a weakside linebacker, which hurts him as far as positional value goes. As the NFL becomes more oriented toward stopping the pass, the premiums are on quarterbacks, tackles, wide receivers, pass rushers and corners.
Everyone else takes a back seat. Trevathan is great against the pass for a linebacker, but that's not why teams draft linebackers. They draft them to get to the quarterback.
Trevathan can get to the quarterback, but his size is too much of an issue for him to be used much as a pass rusher. He'll do a very good job at what he projects to do, which is contain the outside on running plays and pick up midfield threats in coverage, but that's it.
Trevathan has some good physical tools, but he doesn't profile well rushing the passer due to his lack of ideal NFL size. That said, the Kentucky product should be an effective asset against the rush, which makes him a good fit for the stout Denver Broncos' defense. With all the talent already on that side of the ball, Denver can use him as a role player and/or be patient for the other facets of his game to develop.