Quote Originally Posted by X
Pete Rademacher fought for the undisputed world heavyweight championship in his first fight against Floyd Patterson.

He didn't win (but did knock Floys down in the 2nd), but that would have been an impressive record to hold.
Getting technical John L walked into his bout with James J Corbett, billed as Queensberry Rules World's Heavyweight Champion. A title he was given because he was unbeaten London Rules World's Heavyweight Champ.

So you could say Sullivan with no fights is pretty hard to beat.