A few years ago, a couple of guys on the Missouri State basketball team got frostbite from improper footwear. One missed the last 3 months of the season and transferred out, so he didn't play for another year and the other guy never played again. I think having the skin heal on your feet and then developing calluses again could take a long time. People with amputations stumps take forever to develop calluses for their prosthetics.
I don't even like Pitsburgh or hate Oakland but it feels pretty awesome to see that nutcase fuck over Gruden and Mayock. The warning signs were everywhere when he was having issues with enabler Tomlin.