Two points..
I recall reading that he had been given an induction into the eagles when he arrived and surely that state side must have been part of that. After all if as you say he was barely a teenager then he must have gotten the info from the induction.
Secondly why the hell is nicnat even playing if he's underdone, injured, not contributing? You don't play someone like that to build fitness... he's barely jogging enough to raise a sweat.
Yeah, I was wondering that too. He clearly wasn't fit, he wasn't leaping as well as he could, he was only jogging in between contests. Even vision-impaired Freddy could see that.