Mike Tyson KO1 Jack Johnson?

Who was the second? Obviously Dempsey, but who else?

 

Many , but, not all of 1900 fighters were less polished than a couple of decades later...
but, this was not their fault !
When asked if he could go 45 he just said it wouldnt matter anyway because it wouldnt go terribly long and lack of being polished would cost them....but this is not fair to some of them...add more head movement and sustain the combos to johnson, or take away some of this to a tyson, and its a fairer deal...basically i think johnson mentally and physically was better boxing talent than tyson