Besides Fan Man http://www.youtube.com/watch?v=vKoAlpWD_Lg i'd have to opt for the Calzaghe Lacy beatdown
Actually Calzaghe should have put him away but he failed. It was dominant performance, but there was no cherry.
Which makes a big beating. Had Joe stopped in the 5th or 6th, it would never even be considered a contender in this category.
the question is probabily phrased wrongly, i'll say the most one sided title fight that was supposed to be compatitive are JC vs lacy and RJJ vs Toney
Ali vs Frazier 3 - Both of them took a hell of a beating Mosley vs Margarito - Granite was smashed Pacquiao vs Diaz - Drawn out beating, which lead to a devastating finish Baer vs Carnera - Completely overmatched, and was on the deck quite often
Unfortunately, and I'm sad to say it, the one that instantly springs to mind is Irish Billy Collins against Luis Resto. That photograph of Billy's face still haunts me.
Kind of going away from the spirit of the thread has anyone taken as much a beating in 3 consecutive fights as what Margarito has from Cintron, Cotto and Mosley? I personally think he's one beating away from permanent brain damage.