Broncos lose center Dan Koppen to knee injury

The Broncos may have lost Dan Koppen after the center rejoined the team five weeks ago.
Dustin Bradford/Getty Images

Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.