"ALEXANDER"

I've wondered for decades about the actor playing Alexander in this film.
Whomever it was is not credited, and that in it self is mysterious, as he is mentioned often in the script.
Was he the now late Barry Walker, who was a varsity running back at Ohio State University?
Asking Buckeye fans hasn't gotten anything but, "That's the rumour, but I don't know"
I've noticed people on this post who were part of the cast, one of you might know.