Penny's situation was kinda different though. For one he had microfracture surgery. He was also one of the first to ever get the surgery, so the recovery timetable wasn't as concrete as it is now. Coming back as soon as he did probably fukked him up more than the actual injury
Dude tried to come back within 2 months off an operation that keeps players now out from 6 months to year.
I didn't know that...
@ you comparing Adrian Peterson to a regular human being. Nobody wins by comparing normal athletes to metahumans like AP and LBJ 
