Said it on the other thread, but Sam Newman played from 68 to 80 with one functional kidney.Remember Tom Lonergan from the Cats, had a kidney removed, not saying it will be that bad but it's potentially an extremely serious injury.
I recall he was advised to retire because obviously if he stuffed the other one up he would be in some deep poo.
Phil Davis had lacerated kidney but didn't show signs and symptoms until after the game, which he played out.
Fingers crossed for the great man.