Don't know if his chin is glass or not, but he's a Mayweather wannabe with no real skills or attributes to speak of. Just a very mediocre fighter. Nothing special or advanced about his game. No innate ability to seamlessly integrate offense and defense, poor headmovement, just a basic fighter who employs a shitty shoulder roll and doesn't have any clue how to deal with a competent pressure fighter. I'm not fooled by wins over Rodriguez and Litzau. They suck. The Ponce De Leon fight tells me what I need to know. Any special fighter deals with Ponce De Leon handily.