Cory O Brien has seen 294 bands.

Band Concerts Seen
  Clutch 16 concerts
  Sevendust 6 concerts
  Avatar 5 concerts
  Chevelle 5 concerts
  KISS 5 concerts
  Korn 5 concerts
  Anthrax 4 concerts
  Disturbed 4 concerts
  Killswitch Engage 4 concerts
  Nonpoint 4 concerts
  Rob Zombie 4 concerts
  Slayer 4 concerts
  Alice In Chains 3 concerts
  John Mayer 3 concerts
  Marilyn Manson 3 concerts
  Megadeth 3 concerts
  Metallica 3 concerts
  Mudvayne 3 concerts
  Nine Inch Nails 3 concerts
  Prong 3 concerts
  Queensrÿche 3 concerts
  Seether 3 concerts
  Tool 3 concerts
  White Zombie 3 concerts
  All That Remains 2 concerts