I'm about half way through, haven't had much time to read lately. Amazing book. Mark has lived a crazy life. His childhood was pretty fucked. Dudes a tough sob that lived a tough life. Imagine if he gave everything he had to fighting his whole life, he would be goat. Dude was beating some if the best kick boxers in the world hungover. Amazing 
Didn't realize he had a book. Will look for it. Thanks!
read it, great read. tough life
Haven't read but will in the future. The guys just a natural at fighting. His full potential was never reached, but he never needed to reach that level to succeed in life. 
Excellent book just finished it