Hmm, well that's fairly hopeful then.
One thing that stat shows is that talk of 'natural ability' is overhyped. Lampard didn't bang them in as soon as he stepped on the pitch.
Fantastic footballers work fantastically hard. I do think people can have a biological advantage but it's worthless without work and the right environment. Athleticism comes naturally, success doesn't.
Hopefully Ross can be nurtured in the best possible way because he certainly has the physique. As you say, I think that double leg break and MCL are about as harsh as it gets. I think we really overlook how damaging that has been to his development, which is really a credit to Ross' ability.