It's an anomaly in the cruel sport of boxing, that's for sure. But it happens, even more rare so in the case of top fighters. So who's done it? Michael Carbajal beat Jorge Arce in his last fight, a win that's grown a lot with time. Johnny Nelson was undefeated in his last nine years or so as a pro, one dubious draw aside. A impressive feat. Lennox Lewis of course, as long as he doesn't come back.
Eder Jofre had a great run at the end until his final stoppage victory over an old Vicente Saldivar, all during his post-Harada comeback at Featherweight.