IDK man, dude is wired differently. Though, it's still very high that he will. I'd put it at like 95% that he will declare.
I'm telling you, I think him and Luck are wired the same in that while they love the game of football it is not their sole purpose in life to excel or pursue it. He's a guy that I could see playing a shorter than you would expect career, like Luck. Though if Luck were not getting so beat up he probably would still be playing.