Depending on how serious he was, maybe yes, maybe no.
If he just was looking to get in shape, maybe be slightly competitive in the strength sports, then yes. If he started to talk about bodybuilding , etc...... like it was a career path? Nope, that would be nipped in the bud.
Truthfully, I'd point him toward Track & Field if he was a youngster and showed talent. Good way to stay fit and strong, some educational/financial rewards, etc..... Love football, but would worry about injury.