Any of the old guys would have killed the new guys because the old guys fought a lot more which meant they had more time to get better at boxing.

A guy who fought 10 times is gonna be better than a guy who fought 1 time and a guy who fought a 100 times (greb) is gonna be better than a guy who fought >50 times (Mayweather) and that's a scientific fact, I don't know how anyone would argue that.

People always argue who was the best boxer of all time and names like SRR, Greb, Leonard, Duran, Whitaker, ect get brought up. All of those answers are just a product of ignorance.

Len Wickwar was the greatest fighter of all time because he fought nearly 500 times. Can you imagine how much boxing knowledge he had after his last fight? At that point he could kill a man with one punch, which is why I think he had to stop.