Not an exact comparison, look at how Tommy John surgery has evolved to the point where guys are coming back as good if not better than they were.
As was said, everyone's body is different and they rehab at different levels with perhaps some players more motivated to do the work pushing the matter and coming back better and quicker.
There are also a number of players in college who are back this year from ACL's with similar encouraging results. Tennessee's WR Justin Hunter and SC's RB Marcus Lattimore both coming off ACL's have a shot at being the first player drafted at their position if they come out this year.
The thing that it would be good to know if someone here knows....has the surgical procedure changed or is it the rehab regimine that's allowing these guys to (seemingly) get back in shorter time.
Tommy John was the first thing that came to my mind too.
There have been huge advancements in ACL reconstruction over the years, and I'm becoming more and more of a believer it's not a death blow to players as it was in the past for decades. Amazing stuff.
-- Signed, the biggest offseason critic & skeptic of AP/Charles returning in the shark tank
PS It also was pointed out that people heal quicker than others, and that's true too; AP is 100% martian.