Wasn't Tunney bleeding from the nose, mouth and cut over both eyes in his first fight with Greb? Not sure a guy that can't punch could do that to Gene Tunney..
Greb also had the usually durable Bill Brennan in very serious trouble in two of their fights... Not bad for a guy who couldn't punch.
I love this mysterious warrior on so many greats resumes as there conqueror, arguably the best P4P fighter ever and all we have is footage of him passively playing around or exercising no hint of greatness at all in the film.