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

Rich Roll is a plantpowered wellness advocate, bestselling author, ultra-athlete and host of "The Rich Roll Podcast" available on iTunes. http://www.richroll.com/

Natasha Leggero is a comedian, known for her appearances on the Comedy Central Roasts of James Franco & Justin Bieber. Her new show "Another Period" premieres on Comedy Central June 23rd.

Greg Proops is a stand-up comedian, also well-known for his improv comedy on the show "Whose Line is it Anyway?" He currently hosts his own podcast called "The Smartest Man In The World" and has a new book available in May 2015 called "The...

Jonathan Gottschall is an American literary scholar specializing in literature and evolution. He teaches at Washington and Jefferson College in Pennsylvania and his latest book, The Professor in the Cage, is available now. http://jonathango...

Les Stroud is a Canadian musician, filmmaker, and survival expert best known as the creator, writer, producer, director, cameraman and host of the television series Survivorman. New episodes of Surivorman begin airing on The Science Channel...

Adam Scorgie is an independent filmmaker, most commonly known for his work on The Culture High, The Union: The Business Behind Getting High & Ice Guardians. http://www.theculturehigh.com/

Ricky Schroder is an actor and film director. He debuted in the 1979 hit film The Champ, going on to become a child star on the sitcom Silver Spoons. His latest work, a docu-series called "The Fighting Season" can be seen on DirecTV or down...

Joe is joined by Eddie Bravo & Brendan Schaub to watch the fights on April 11, 2015. (Part 2 of 2)

Ms. Pat is a stand-up comedienne, and will have a story featured on an upcoming episode of "This Is Not Happening" on Comedy Central airing Thursday night at 12:30am.

Katy Bowman is a biomechanist, heavy on the bio, and author of books on natural movement & human development, solving diseases of captivity. http://www.katysays.com/

Joe Schilling is an American Muay Thai kickboxer who competes in the super middleweight and light heavyweight divisions. Joe's upcoming fight is February 6th at Glory 19 on Spike TV.

Ali Rizvi is a writer, musician, physician, currently working on his first book, The Atheist Muslim. http://www.huffingtonpost.com/ali-a-rizvi/ http://podcasts.joerogan.net

Randall Carlson is a master builder and architectural designer, teacher, geometrician, geomythologist, geological explorer and renegade scholar.

Bert Kreischer is a stand-up comedian, actor and reality television host. Check out his book "Life of the Party" on Amazon and his podcast "The Bertcast" on Stitcher & iTunes.