edit: Sorry for the ambiguity. I’m curious about the fighters who have changed the most careers, not the losers of those fights.

Inspired by this video (DJ) and this one (Tony Ferguson) .

I think this is an interesting question, one I don’t feel qualified to answer, so I am farming it to the community here. MMA is a dangerous sport, and practitioners put their life on the line, even whilst training. Ideally, fighters fight and walk away to prep for the next one.

However, there is an undeniable attritional factor. It chips away at them. Sometimes, it takes chunks at a time; the cliches are “taking years off” or “life altering damage”. Sometimes the scars are mental as well as physical, and fighting a particular opponent in a dramatically violent clash can change anybody.

Who are the fighters that come to mind?

Thank you, and I look forward to the discussion.