Brendan and Bryan welcome John Brenkus from Sport Science into the studio to discuss Ray Lewis, Randy Couture, concussions, and much more! 14:33 - John's Podcast 52:36 - John's First Ironman 1:13:35 - Barkley Marathon For more The Fighter and The Kid visit: http://www.tfatk.com/ Follow Bryan on Twitter: https://twitter.com/bryancallen Follow Brendan on Twitter: https://twitter.com/brendanschaub The Fighter and The Kid on Facebook: https://www.facebook.com/thefighterandthekid/ Listen to The Fighter and The Kid on Soundcloud: https://soundcloud.com/fighterandthekid Subscribe to The Fighter and The Kid on iTunes: https://itunes.apple.com/us/podcast/the-fighter-the-kid/id706421907?mt=2 Subscribe to The Big Brown Breakdown on iTunes: https://itunes.apple.com/us/podcast/big-brown-breakdown/id1210250626?mt=2&i=1000382077906