As a kid Khalil Mack loved basketball, not football. He didn't even start playing football until his senior year of high school. That season he racked up 140 tackles, an amazing total. From then on, football became Mack's focus, and he proved to be a force on the gridiron. In the National Football League, he was named defensive player of the year in 2016, and today he is widely recognized as one of the most dominant players in the pro game. It's easy to see why in this engaging, hard-hitting biography.