Yesterday afternoon it was reported that Denver Broncos left tackle Ryan Clady was diagnosed with a Lisfranc sprain. It remains to be determined how much time the lineman will miss, but the Broncos are fearing the worst, as Ian Rapoport of NFL.com reports Denver believes Clady could be done for the season.As I said on ATL: Broncos LT Ryan Clady could miss a few weeks with a lisfranc sprain -- or more. There's a fear his season could be over.— Ian Rapoport (@RapSheet) September 16, 2013When Clady was hurt, there was concern around the Broncos and fans considering it’s his job to protect Peyton Manning’s blind side. Initial reports seemed to indicate that Clady was OK, despite the fact that he was seen after the game sporting a walking boot.It appears this couldn’t have been further from the truth, as the Lisfranc diagnosis is potentially devastating. We’ve seen it end the seasons of Jacksonville Jaguars running back Maurice Jones-Drew and New York Jets wide receiver Santonio Holmes.It remains to be determined how long the Broncos will be without Clady, but it’s clear he’ll be sidelined for an extended stretch. Next Sunday will mark the first game Clady will miss since being selected in the first round of the 2008 NFL Draft. He’ll be replaced at left tackle by Chris Clark, who recently agreed to a two-year contract extension with the team.Follow @TheNFLInjuryRpt Looking for fantasy football advice?