Question: Bryan Christopher Callen regularly appears on a podcast by an American stand-up comedian who started his stand-up career in what year?

Context paragraphs:
Joe List: Joe List (born April 6, 1982) is an American stand-up comedian.  He began performing stand-up comedy in Boston, Massachusetts in 2000, shortly after graduating from high school.  He has been featured on Conan and The Late Show with David Letterman.  In 2015 List was a finalist on NBC's Last Comic Standing and recorded a half-hour comedy special on Comedy Central.  His albums 'So Far No Good' and 'Are You Mad at Me?'  can be heard regularly on Sirius Radio.  List is also the co-host of his own popular weekly podcast 'Tuesdays with Stories' with fellow comedian Mark Normand as well as being a regular on Robert Kelly's 'You Know What Dude' podcast.  In 2016 he toured the United States and Europe opening for Louis CK on his international tour which included three performances at Madison Square Garden.  List is a regular at the Comedy Cellar in New York City.

Robin Williams: Robin McLaurin Williams (July 21, 1951 – August 11, 2014) was an American stand-up comedian and actor.  Starting as a stand-up comedian in San Francisco and Los Angeles in the mid-1970s, he is credited with leading San Francisco's comedy renaissance.  After rising to fame as Mork in "Mork & Mindy" (1978–82), Williams established a career in both stand-up comedy and feature film acting.  He was known for his improvisational skills.

Kate Smurthwaite: Kate Smurthwaite (born 9 December 1975) is a British stand-up comedian and political activist.  A radical feminist, she regularly appears on British television and radio as a pundit, offering opinion and comment on subjects ranging from politics to religion.

Joe Rogan: Joseph James Rogan (born August 11, 1967) is an American stand-up comedian, color commentator, podcast host, and retired martial artist.  A fan of comedy since his youth, Rogan began a career in stand-up in August 1988 in the Boston area, developing a blue comedy act.  He moved to New York City two years later.

Bryan Callen: Bryan Christopher Callen (born January 26, 1967) is an American actor, comedian, and podcaster.  He studied acting at the Beverly Hills Playhouse, and got his start as one of the original cast members on the sketch comedy series "MADtv".  Callen is co-host of the successful independent podcast "The Fighter & The Kid," alongside entertainer and former UFC Heavyweight contender Brendan Schaub.  He regularly appears on the Joe Rogan podcast The Joe Rogan Experience.

Michael Yo: Michael Yo Simmons (born November 20, 1974) is an American actor, TV Host, Hollywood expert and stand-up comedian.  He currently co-hosts The Insider on CBS, as well as Yo Show on Yahoo! TV, which garners an average of 1.5 million views per episode.  Yo also appears regularly on the comedy panel of E!'s Chelsea Lately and as a guest host for The Talk on CBS.  Yo continues to appear as a Pop Culture expert on HLN's Showbiz Tonight hosted by A.J. Hammer.  Michael tours the country as a professional stand-up comedian, appearing at the Improv’s, Stand-Up Live, Palms Hotel, Laugh Factory, Comedy Store, and Comedy Juice among others.  His Hot Mess Tour also performs at colleges throughout the country.

Greer Barnes (comedian): Greer Barnes (born 1964) is an American stand-up comedian and actor.  He is known for clever wordplay, observational humor, sketch comedy, mimicry, and energetic physical comedy.  He has performed at comedy clubs, in comedy festivals, in commercials, on television and in films.  He regularly appears at The Comedy Cellar in New York City’s West Village.

Bill Burr: William Frederic Burr (born June 10, 1968) is an American stand-up comedian, actor, writer, podcaster, and social critic who has released several stand-up comedy specials.  Outside of stand-up comedy, he is known for hosting the "Monday Morning Podcast", playing Patrick Kuby in the AMC crime drama series "Breaking Bad", and

Aron Flam: Aron Flam (born 12 June 1978) is a Jewish stand-up comedian, screenwriter, author, television host, podcaster, and actor.  He started his career in stand-up comedy in his hometown of Stockholm in 2007.  Flam was awarded the "Rookie of the Year" award in 2009 at the Swedish stand-up gala.  He is a co-host of the podcast "Till slut kommer någon att skratta" alongside fellow Swedish comedians Soran Ismail and Petter Bristav.  He is also the host of SVT Play's political satire web series "Folkets främsta företrädare".

Joey Diaz: Jose Antonio "Joey" "CoCo" Diaz (born February 19, 1963) is a Cuban American stand-up comedian, actor and podcast host.  Born in Cuba and raised in New Jersey, Diaz began his stand-up career in 1991.  He had roles in the television series "My Name is Earl" and the films "The Longest Yard" and "Taxi".  Since 2012, Diaz has hosted the podcast, "The Church of What's Happening Now".  He is also a regular guest on "The Joe Rogan Experience".

Supporting paragraphs: Bryan Callen Joe Rogan
Answer: 1988