I didn't read the question at first. I had pictured 10 Hearns in the ring at once. Now how long would it take Tyson to KO one Hearns? Well it could vary. I am assuming the 10 Hearns could collaborate. So the first 8 or so just go in, purely to last. Tyson could blast them out in 2 rounds, this would be tiring though. Imagine 16 rounds of blasting out your opponent. Tyson is going to be pretty tired by then. In fact, your not going to fight 16 rounds at the pace, so Tyson will in fact take longer to beat some of the Hearns. Now imagine 8 fight lasting an average of 3-4 rounds, which ends up as 24-32 rounds in all. It might even be worse. One of those last two hearns might just UD or stop an exhausted Tyson. I favor Tyson to win most of the fights, but the last few Hearns to get the UD.
Assuming it's normal between round time, Tyson would win so long as there wasn't collaboration to the extent that the first 8 Hearns are just running around the ring. If each fight is a serious attempt on the part of hearns, some of them would last like 15 seconds.
Tyson would starch 10 Tommy's one after another. I like your odd loopy thread CT but this one lacks your usual balance. Tyson is a welterweights/middleweights worst nightmare, surely. He'd do the same to 10 clones of the robust Hagler, or Monzon.
Does your lab have all kinds of different, richly-colored viles and bubbling test tubes amdist the fight posters? :yep