I think we need a few more variables to be answered before we can furnish a complete answer to this question, but I think Harry Greb would win a decision in any fight 12 rounds or longer.
Sam Langford might hang in there quite a while. Sam was pretty good at fighting half blind, or worse.
Neither were blind, and the boxing commissions doctor wouldn't allow it, unless he gets paid off, but NY 1930's MSG it could be done. Max Baer said, they're are all thieves control by Mike Jacobs.
Perhaps, maybe, only because, Henry was a lightweight. I take that back Armstrong hands down would win, by hitting him in the balls, every round that it lasted in MSG.
You actually nailed it, congratulations. Armstrong closed Days right eye, not with his fist, but his elbows, looping blows to his face. But, still Day took the lead away from Armstrong in the eight round by cutting open a deep gash on Henry's eye lid, and the referee stopped the fight, and called in the commission doctor to decide whether or not stop the fight, yeah, so that won't happen, they'd kill the doctor. Davey was slicing up Armstrong, and the fans were yelling to finish him in the 9th, 10,th, 11th, 12th round. Armstrong hit Davey 5 times below the border in the 11th round, referee took the round away from Henry. In the 12th round Day was ahead, until Henry got a shot to Davey's blind side and went down on all fours, as he was getting up the referee looked at Henry's bloody face and said, that's all at 2:49 if the 12th round, Day would have beaten the count. Henry was over exhausted and was helped out of the ring, still wearing his crown. He received some lasting souvenirs from Davey, a broken right hand, four stitches to his eye, left hand badly bruised and blotches over his face. Day went home with a red eye. Pian and Winch offered Armstrong/ Mead his manager $35,000 plus a percentage of the gate for a rematch in Chicago, that would have been $100,000. He said no. Armstrong hit Day nearly every round , if not all rounds below the border and was penalized just for two. Days injury to Armstrong hands helped Amber's to beat Henry, along with taking away five rounds for low blows by Armstrong. Day knockout /tko Pedro Montanez for a title match with Armstrong, and passed on Day, and decided to fight the injured ( suffered two cuts to his eye with Day, requiring five stitches to close) loser Montanez instead. That's how it was in NY with Mike Jacobs in control, who had 25% interest in Armstrong and Joe Louis, his Golden Gooses. "That's all Folks" Have a nice day.