Hollerhan has seen 303 bands.

Band Concerts Seen
  Billy Joel 4 concerts
  Joan Jett & The Blackhearts 4 concerts
  Styx 4 concerts
  Weezer 4 concerts
  Alice Cooper 3 concerts
  Def Leppard 3 concerts
  Foreigner 3 concerts
  Mammoth WVH 3 concerts
  Matt Nathanson 3 concerts
  Red Wanting Blue 3 concerts
  Sammy Hagar 3 concerts
  The Cleveland Orchestra 3 concerts
  Twenty One Pilots 3 concerts
  TWRP 3 concerts
  Andrew McMahon in the Wilderness 2 concerts
  Billy Idol 2 concerts
  Classless Act 2 concerts
  Coldplay 2 concerts
  Dave Chappelle 2 concerts
  Donnie Iris & The Cruisers 2 concerts
  Dr. Dre 2 concerts
  Duran Duran 2 concerts
  Evanescence 2 concerts
  Fall Out Boy 2 concerts
  Foo Fighters 2 concerts