Clay Matthews has ridden his 6'3", 255-pound frame and his long, flowing blond locks to fame as one of the most recognizable faces in the NFL today. Matthews may have been a walk-on at USC, but he quickly bulked up and started terrorizing opposing quarterbacks on his way to becoming a top prospect for the 2009 NFL Draft (eventually going 26th overall to the Green Bay Packers). At the combine, he impressed scouts with a 4.67 40-yard dash time, by benching 225 pounds a total of 23 times, and logging a 35.5-inch vertical leap. Matthews stays in peak physical condition by following the Jay Glazer- and Randy Couture-founded MMAthletics regimen. It’s a high-intensity workout (detailed in a FoxSports.com article by Glazer himself) that keeps players like Matthews and Minnesota Vikings defensive end Jared Allen ready for anything on the field and helps them become absolute warriors, let alone fantastic football players.