Neither guy has a fraction of the power of JDS who happened to hit Cain in just the right spot to rattle his brain. Cain has an exceptional chin that has held up to very powerful strikes. I don't think any volume of strikes from Bones or Weidman would really daze him too much. Cain won't quit and neither guy can flash KO Cain like JDS. I don't think they even have half the power required to stop Cain.
Didn't Cheick Kongo knock him down like three times or so in their fight¿