In February 2015 , Mayer performed alongside Ed Sheeran at the Grammy Awards . As of March , Mayer said he was taking break from working on a " deeply personal new album " . Also , Mayer recounted that in 2011 he happened upon a song by the Grateful Dead while listening to Pandora , and that soon the band 's music was all he would listen to . In February 2015 , while guest hosting '' The Late Late Show '' , Mayer invited Grateful Dead guitar player Bob Weir to join him in a studio performance . While Weir , Phil Lesh , Mickey Hart and Bill Kreutzmann ( surviving members of the Grateful Dead ) were preparing for their Fare Thee Well : Celebrating 50 Years of the Grateful Dead tour with Trey Anastasio , Mayer began practicing the band 's catalog of songs . That August , Mayer , Weir , Kreutzmann , and Hart formed the group Dead & Company , along with Jeff Chimenti and Oteil Burbridge , and began a fall tour in the United States . The tour was well received ( '' Billboard '' called it " magical " ) , and they continued to tour the US into 2016 . Although Lesh has declined to join Dead & Company , Mayer also performed with Phil Lesh and Friends at Terrapin Crossroads in 2015
Grammy Awards
57th Annual Grammy Awards
John Mayer