Pump is lead singer Mike Castella, Frank Tassielli on bass/background vocals, Tom Collier on lead/rhythm guitars, Jason Perillo on lead/rhythm guitars and keyboards and Tom Battaglia on drums.
Pump is lead singer Mike Castella, Frank Tassielli on bass/background vocals, Tom Collier on lead/rhythm guitars, Jason Perillo on lead/rhythm guitars and keyboards and Tom Battaglia on drums.