The chin is a button for 99% of fighters because there are nerves behind it. Always protect your chin, it doesn't matter who you are if you get caught square on the chin, you're more likely going down or at least getting staggered so keep it tucked. Ortiz has a pretty good chin and Floyd isn't the most powerful puncher, but noticed when he two pieced Ortiz square on the chin, even Ortiz couldn't get up. The fighters who are known to have great chins usually aren't really getting caught square on the chin, but rather they keep their chin tucked and are getting caught on the head, as in the upper lip and above (not the temple though). They have a hard head and or good recovery rather than a iron chin. When you keep your chin tucked and your guard up, even if you get hit on the chin your body can absorb some of the impact so it can look like the fighter has an iron chin. Also, there really is an art to getting hit. Good fighters know how to roll with the punches so that they don't feel the full force of the punch. Don't get hit in the temple and don't get hit in the chin. Now if you can't handle getting hit with your guard up and your chin tucked, better work on your defense. This is boxing, it's hit and don't get hit, not a Rocky movie.
