He managed The Consumers (1977), an obscure but increasingly acclaimed early American punk band from Phoenix, Arizona.
He has written for publications including The Washington Post, Arizona Republic, The New York Times, Harper's Bazaar, The Village Voice, The Face, and GQ.
From the earliest days of his work, Bull chronicled subcultures, with pioneering reporting on skateboarding, cockfighting, lowriders, punk, cowboy and rodeo culture, hiphop, heavy metal and others.
A list of the individuals Bull has profiled include Muddy Waters, John Lee Hooker, Al Green, Buck Owens, James Stewart, Walter Matthau, Ian Dury, David Lynch, Bruce Springsteen, Bill Graham, Tracey Ullman, Tobe Hooper, Buckminster Fuller, Tom Waits, William S. Burroughs, Sun Ra, Prince, Clifton Chenier, Ofra Haza, Steve Miller, Jackson Browne, John Fogerty, Steve Martin, President Gerald Ford, Elvis Costello, Richard Farnsworth, Dwight Yoakam, Joe Ely, Joan Baez, Peter Tosh, Laura Dern, Jeff Beck, Frank Zappa, Michael Jackson, Ed "Big Daddy" Roth, Allen Ginsberg, Amiri Baraka, former Arizona Governor Evan Mecham, Carlos Santana, and Patti Smith.
He edited and introduced Clarence "Gatemouth" Brown's memoir, All About Me, working to preserve the visionary musician's self-created spellings and syntax.