Hey we all make mistakes in life, I hope the guy truely gets himself on track.
It's possible, but I wouldn't bet on it.
As you probably know, there are some people in the world who "just don't get it" (and likely never will). Four of said folk have been mentioned in this thread: Vince Young, Titus Young, JaMarcus Russell and Ryan Leaf.
Each one had the unfortunate combo of world class physical talent in their bodies but faulty wiring upstairs. Whether it was inability to control their emotions, poor work ethic, just plain immaturity or whatever, they just didn't have what it takes. I could also throw in Jeff George as another prime example in that same mold.
Some guys just never grow up, and it's always a shame. When that much talent has such great opportunity and for whatever reason it all winds up going to waste, it's tragic.
Sadly, it's also fairly common.