John Mayer

The guitarist has worked with many other rock legends apart from the Grateful Dead offshoot.

No tickets? No problem. Over two dozen movie theaters across the U.S. and Canada will broadcast the show.

Toto's Steve Lukather brought it onstage weeks after John Mayer played the instrument with Dead & Company.

Guitarist vowed injury wouldn't affect his performance during Sphere residency.

Guitarist segued between the Grateful Dead classic and his 2001 solo hit at recent Chicago concert.