My least favorites are any recent ones that involve weight classes and titles. They are all so watered down even if they are impressive.

My favorite one is Harry Greb going 45-0 in 1919. I get that many of them weren’t world beaters but he fought 5 HOFers a total of 10 times. He also fought in 21 cities in 8 states. That’s a lot considering the time. Also, Greb got some injuries during the year and had to cancel a few more fights because of them. Again, I understand that all of these fights weren’t against top notch opponents, but still it’s insane having to fight that many times in one year while battling injuries and winning them all.