Abby Martin is an American journalist and former host of "Breaking the Set" for RT America. Check out her work at http://mediaroots.org

Bryan Callen is an actor and stand-up comedian, and together with Brendan Schaub he also hosts "The Fighter & The Kid" podcast. http://bryancallen.com

Nick Curson is a strength and conditioning coach known for working with UFC World Champion Rafael Dos Anjos and Russian boxer Ruslan Provodnikov. http://www.speedofsport.com/

Corey Knowlton is an international hunting expert, known recently for winning a $350,000 auction to kill a black rhino in Namibia. He is also known for working with hunter Jim Shockey on television shows "The Professionals" and "Uncharted"

Rich Vos is a stand up comedian. He and his wife, Bonnie McFarlane, have a documentary "Women Aren't Funny" available now on iTunes. http://podcasts.joerogan.net

Joe is joined by Aubrey Marcus, Eddie Bravo & Brendan Schaub to watch the fights on May 16, 2015.

Dean Delray is a stand up comedian. He has his own podcast called "Let There Be Talk" available on iTunes & Stitcher. http://deandelray.com/

Jordan Gilbert is a professional gamer better known as "c9n0thing" on the internet. He is currently best known for playing Counter Strike: Global Offensive and can be seen streaming his gameplay at http://www.twitch.tv/n0thingTV

Steve Maxwell is an American fitness coach, physical educator, and Brazilian Jiu-Jitsu instructor. He was named one of the top 100 trainers in the USA by Men’s Journal.

Sam Harris is a neuroscientist and author of the New York Times bestsellers, The End of Faith, Letter to a Christian Nation, and The Moral Landscape. His latest book "Waking Up: A Guide to Spirituality without Religion" is available now.

Dr. Dan Engle, MD is a practicing psychiatrist, board certified in psychiatry and neurology. Aubrey Marcus is writer, entrepreneur, and adventurer. Some of his writings and experiences can be found on his website, WarriorPoet.us, as well a...

Jim Norton is a stand-up comedian, radio personality, author, and actor. His latest special "Contextually Inadequate" debuts April 24 on Epix.

Greg Fitzsimmons is a stand-up comedian. He also hosts his own podcast "FitzDog Radio" available on iTunes and every Monday on Sirius Howard 101. http://fitzdogradio.com http://podcasts.joerogan.net

Joe Schilling is an American Muay Thai kickboxer and MMA fighter who competes in the super middleweight and light heavyweight divisions.

Tom Segura is a stand-up comedian, and hosts his own podcast with his wife, Christina Pazsitzky called "Your Mom's House" http://www.yourmomshousepodcast.com