Jason O'mara has seen 8 bands.

Band Concerts Seen
  Arm's Length 1 concert
  Darkest Hour 1 concert
  Exodus 1 concert
  Fit For An Autopsy 1 concert
  Knuckle Puck 1 concert
  One Step Closer 1 concert
  Real Friends 1 concert
  Undeath 1 concert