Brennen has seen 52 bands.

Band Concerts Seen
  AJR 5 concerts
  Twenty One Pilots 3 concerts
  Fall Out Boy 2 concerts
  Green Day 2 concerts
  Hot Mulligan 2 concerts
  Trans-Siberian Orchestra 2 concerts
  Weezer 2 concerts
  311 1 concert
  Against Me! 1 concert
  Against the Current 1 concert
  Any Given Sin 1 concert
  AWOLNATION 1 concert
  Black Stone Cherry 1 concert
  blink-182 1 concert
  Bring Me The Horizon 1 concert
  Charmer 1 concert
  Cole Swindell 1 concert
  Daisy the Great 1 concert
  Def Leppard 1 concert
  Eddie Money 1 concert
  Flora Cash 1 concert
  Four Year Strong 1 concert
  Free Throw 1 concert
  Gayle 1 concert
  half•alive 1 concert