The article doesn’t mention him having had any injuries in the game, so he’s probably been fortunate enough to not have had any serious ones.
He seems to be aware enough to see life beyond the game, if he did ever get knocked about, he’d probably contemplate retirement.
In all his years of football from (probably) age 10 to now, he's never been hit in the head? Yeah, things seem fine now, but later when his brain starts to shut down he's going to have some problems.