The Facts: Keller is "on track to return" from a severe knee injury according to Tom Pelissero of USA Today.

Diehards Line: Keller, a former New York Jet, was coming on strong with the Miami Dolphins in 2013 before tearing his ACL, MCL, and PCL and dislocating his right knee in the Dolphins' third preseason game. As the Redzone.org notes, it was a gruesome injury and there has been speculation that Keller will never play football again. NFL teams will likely want to see the 30-year-old Keller work out before they even consider offering him a contract.