Based on hair, jaw, and chin, I would say that is Chuck Connors. It would have been helpful if the cameraman had been about 30 feet closer to the action.
Sure looks like Chuck. His name is Connors not Conners. Fucking hypocritical conservative republican. Unfortunately poor quality film from the stone "hard" ages.
It's Chuck Connors at an early age.. some say this man is not tall as Chuck but you can't go by that because the other man could have been tall too.. what's the chances of two different men with the same facial features, square jaw, chin and left handed going to be, yes it's him.