They weren't looking for a trade. After all, what happens if Trevor flames out by throwing wild picks like he did the last 2 games, AND Brock comes in and plays like he did to get benched in Houston, AND Paxton is healthy?
Remember that after the Chargers game the Broncos play on the road at the Chiefs and Eagles, the two best teams in the NFL right now, and then home against the Patriots. Lose this winnable game and they could easily wind up 3-6. Even with a win, they're likely to lose at least 2 of the next 3 and possibly they have no chance in all three.
I'd write up the Eagles game right now as a loss for instance. But, then they've got 5 games against the Raiders, Dolphins, Jets, and Colts, all winnable. They need to survive the next 4 weeks though.