Who has the worst chin?

[Phil]

Khan by a mile, for me Jones chin is not that bad, he got caught cold by Tarver after coming down from heavyweight but no way I'd call him china chin'd, Patterson had a bad chin at Heavy but in fairness for a little guy he wasn't that bad, the only ones that managed to stop him were Liston, Ali and Johannson all who could really bang.

[Spicoli]

What about Roger Mayweather ? Still puzzled as to how he stood up distance with Tszyu in late stage.........He is one that had both highlight reel KO wins as well as Losses