Filed under: Stream NFL Broncos lose Dan Koppen to torn ACL Contributors: Scott Schroeder, Steven Muma, and Matthew Fairburn Share this story Share this on Facebook Share this on Twitter Share All sharing options Share All sharing options for: Broncos lose Dan Koppen to torn ACL Reddit Pocket Flipboard Email Dan Koppen will be out for the 2013 season with a torn ACL, leaving the Broncos searching for answers at the center position. 4 Total Updates Since Jul 28, 2013, 3:35pm EDT Follow this stream July 31, 2013 Lilja ends retirement to join Broncos By Scott Schroeder The Broncos have lured former Peyton Manning teammate Ryan Lilja out of retirement. July 29, 2013 Jeff Saturday unlikely to end retirement By Scott Schroeder It doesn't appear that the Broncos will be reuniting Peyton Manning with his former center, despite injury issues at the position. July 28, 2013 Dan Koppen tears ACL By Steven Muma@akulawolf Denver Broncos center Dan Koppen suffered a torn ACL in practice Sunday, leaving the team perilously thin at the position. July 28, 2013 Broncos center Dan Koppen might have torn ACL By Matthew Fairburn The Broncos' depth at center took another major blow Sunday.