El Jefe has seen 29 bands.

Band Concerts Seen
  Clutch 20 concerts
  Amigo the Devil 3 concerts
  Nate Bergman 3 concerts
  Dropkick Murphys 2 concerts
  Hatebreed 2 concerts
  The Sword 2 concerts
  American Sharks 1 concert
  Blacktop 1 concert
  Crowbar 1 concert
  Devin Townsend Project 1 concert
  Giovannie and the Hired Guns 1 concert
  Graveyard 1 concert
  Helmet 1 concert
  JD Pinkus 1 concert
  J. Robbins 1 concert
  Lionize 1 concert
  Lucero 1 concert
  Mastodon 1 concert
  Mike Dillon & Punkadelic 1 concert
  Mike Westcott Band 1 concert
  Pantera 1 concert
  Prong 1 concert
  Quicksand 1 concert
  Rise Against 1 concert
  Saul 1 concert