Corbett wasn`t that big and a solid shot from a middlewight to the heart could stop them, there`s no reason why being bigger would make you more able to take a shot to the solar plexus, that doesn`t make any sense.
Already posted this earlier, but it applies again. Most of the old time fighters look about the same, they fight like people who have not been trained. Substitute two actors and there is little difference. I looked at the video again, the guy playing Fitzsimmons does manage a straight punch, unusual for that time. The guy playing Jeffries manages to keep his feet spaced, unlike Jeffries in the Johnson fight, and the video is clearer. Guess the quality of the video and the "fighters" being slightly less crude could have been a tip off?
Taking nothing away from Hagler, he was a very effective puncher...there were several...maybe a conga line of middles who hit harder with a single shot, but Hagler was most effective in the way he threw punches.
You're such a boxing expert that you can't find a difference between Bob Fitzsimmons and this actor? You are delusional man...
You know you can just say that you got something wrong and move on? Everyone gets stuff wrong. Trying to defend such a clear mistake is just pointless.