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The Broncos' 2012 starting center, Dan Koppen, is currently an unsigned free agent. Koppen's predecessor and likely successor, J.D. Walton, is still recovering from surgery.
Meanwhile, Louis Vasquez signed with the team earlier this offseason, putting guard Chris Kuper's future in question, especially with Kuper also recovering from surgery. And then there's Ryan Clady, who is in a contract dispute with the team and also recovering from surgery.
That's three potential starters down with injuries.
So, when will they return? Hopefully by the time training camp rolls around.
"I think that's kind of been the target date all along with Kuper, J.D. and Ryan," Coach Fox told the Denver Post. "We're anticipating at some point, if not at the beginning of camp, early in camp, we will get them back full speed."
In the meantime, Denver's starting offensive linemen have been Chris Clark, Zane Beadles, Manny Ramirez, Vasquez and Orlando Franklin. It will be interesting to see who wins the five starting gigs when Kuper, Walton and Clady return to full health.