Douglas "Clay" Cook (born April 20, 1978) is an American songwriter, producer and musician who co-wrote several songs with John Mayer including "No Such Thing", "Comfortable", "Man on the Side" and "Neon".
 Cook and Mayer's songwriting partnership was predominantly through Mayer's early career, as the songs he wrote with Mayer (with the exception of live releases) only appear on Mayer's first two releases, "Inside Wants Out" and "Room for Squares".
 Cook and Mayer formed the band Lo-Fi Masters prior to Mayer recording "Inside Wants Out".
 Cook is currently a member of the Zac Brown Band and was formerly a member of the Marshall Tucker Band and Y-O-U.
Where the Light Is: John Mayer Live in Los Angeles, commonly referred to as Where the Light Is, is a live album and concert film by American blues-rock musician John Mayer.
 Released on July 1, 2008, the album documents Mayer's performance at the Nokia Theatre at L.A. Live in Los Angeles, California on December 8, 2007, during the promotional tour for his 2006 third studio album "Continuum".
Andy Yorke (born 10 January 1972) is an English musician and former lead singer and guitarist for the band Unbelievable Truth.
 He is the younger brother of Radiohead frontman Thom Yorke.
The John Mayer 2008 Summer Tour is a concert tour by musician John Mayer to support his third album, "Continuum".
 The tour has been heavily covered by tabloids due to Mayer's relationship with Jennifer Aniston.
Unbelievable Truth were a British rock band, led by Andy Yorke, with Nigel Powell, Jason Moulster, and Jim Crosskey.
 Their sound has been described as "slow, melancholy, country-tinged ballads, wrapped in a soft blanket of acoustic guitars and minor chords".
The John Mayer Trio is an American blues rock band that formed in 2005.
 Comprising singer-songwriter and guitarist John Mayer, bassist Pino Palladino and drummer Steve Jordan, the band has released one live album, "Try!
" in 2005.
 Three of the songs on the album were co-written by Jordan, Mayer, and Palladino, and the album was co-produced by Mayer and Jordan.
John Clayton Mayer ( ; born October 16, 1977) is an American singer-songwriter, guitarist, and producer.
 He was born in Bridgeport, Connecticut, and raised in nearby Fairfield.
 He attended Berklee College of Music in Boston, but disenrolled and moved to Atlanta in 1997 with Clay Cook.
 Together, they formed a short-lived two-man band called Lo-Fi Masters.
 After their split, Mayer continued to play local clubs—refining his skills and gaining a following.
 After his appearance at the 2001 South by Southwest Festival, he was signed to Aware Records, and then Columbia Records, which released his first EP, "Inside Wants Out".
 His following two full-length albums—"Room for Squares" (2001) and "Heavier Things" (2003)—did well commercially, achieving multi-platinum status.
 In 2003, he won the Grammy Award for Best Male Pop Vocal Performance for the single "Your Body Is a Wonderland".
The Village Sessions is an EP released by artist John Mayer on December 12, 2006.
 Collaborators include John Mayer Trio members Steve Jordan and Pino Palladino, along with Ben Harper, Robbie McIntosh, and Ricky Peterson of Mayer's touring band and former producer for Prince albums.
 The six-song EP contains acoustic and alternate versions of songs found on Mayer's third studio album, "Continuum", and his trio's live album, "Try!
".
 Mayer co-produced the album with engineer Chad Franscoviak.
"Who Says" is the thirteenth single released by American singer-songwriter John Mayer, and the first to be released from his fourth studio album, "Battle Studies".
 It is Mayer's first studio recorded single release since "Say" in 2007.
 On September 25, 2009, "Who Says" was released on John Mayer's official website.
Matt Nasir is a multi-instrumental musician based in London, England.
 He currently plays Keyboards in Frank Turner's band The Sleeping Souls and is a member of the London-based rock band 'The Pressure Room'.
 He has also previously played in Andy Yorke's live band and is known as the 'Archivist' for his remixing work.
 Frank Turner and The Sleeping Souls headlined Wembley Arena in April 2012 and played at the Opening Ceremony of the 2012 Olympic Games in London.
 Matt also features as the guitarist in a side-project, Möngöl Hörde, with Frank Turner and Frank's former Million Dead band mate, Ben Dawson.
 Matt plays a baritone guitar in Möngöl Hörde.

Question: Have John Mayer and Andy Yorke both been members of a band?
Answer: yes