Jason Grzych has seen 99 bands.

Band Concerts Seen
  Anders Osborne 9 concerts
  Gov't Mule 9 concerts
  Galactic 5 concerts
  Tool 3 concerts
  A Perfect Circle 2 concerts
  Daniel Donato's Cosmic Country 2 concerts
  Fishbone 2 concerts
  John Mayer 2 concerts
  King Gizzard & the Lizard Wizard 2 concerts
  Michael Franti and Spearhead 2 concerts
  My Morning Jacket 2 concerts
  RX Bandits 2 concerts
  Tea Leaf Green 2 concerts
  The Black Keys 2 concerts
  The Marcus King Band 2 concerts
  311 1 concert
  Andrew Duhon 1 concert
  BASSNECTAR 1 concert
  Ben Harper & The Innocent Criminals 1 concert
  Benjamin Booker 1 concert
  Black Rebel Motorcycle Club 1 concert
  Briscoe 1 concert
  Bruce Hornsby 1 concert
  Built to Spill 1 concert
  Cold War Kids 1 concert