That has never fought in a different combat sport?
My question to the BE community in this (my timezone) late night post is who are some of the best fighters, specifically in mixed martial arts, that you think could do well in another combat sport?
For example, I believe that BJ Penn, who to my knowledge has never participated in a boxing match (be it amateur or a showcase), would do decently in a boxing match. (FYI, not really, just an example).
The catch is that they can't have actually participated in that other combat sport. Carlos Condit has kickboxing matches on his record, so he doesn't count. Same thing for Alexander Gustafsson. He's an amateur boxing champ in Sweden, so he doesn't count.
Now, that does mean in another combat sport they could be considered. Gustafsson could count towards kickboxing, and Carlos Condit could count towards boxing, etc.
So, who does the BE community feel would do well in another combat sport when they don't have any official/acknowledge record in that combat sport? (Having a rank/belt doesn't count, only if they have recognized official bouts of some kind)