Think like a champion fighter to silence the haters, KO whatever is holding you back, and achieve your dreams Floyd Mayweather Jr. is not just a boxer. He's an undefeated boxer: 50 fights, 50 wins. He's a 15-time World Champion. He's an Olympic medalist. And he's a professional legend who turned the boxing world on its head by becoming his own promoter. In Undefeated Mentality, this extraordinary athlete reveals how he made it all happen by cultivating a can't-lose mindset—and how you can, too. Throughout his career, there was one thing about Mayweather that never changed. He was...