Longest knockout span - Lamar Clark

[supaduck]

This guy had something like 44 KOs in a row http://www.boxrec.com/boxer_display.php?boxer_id=9367
he also fought ali

[Hous]

Unfortunately for him Ali is the only person on his rec even worth checking out. Most of the guys on his rec were 0-1-0, im not even kidding.

Heres a pic of Ali KOing him,

[supaduck]

Yeah don't get me wrong he wasn't a great fighter but his record is still pretty cool.