How many movies have Pat O'Brien and Rob Barrett acted in together?

They have worked on 2 movies together! Their first movie together was Cannibal Corpse: The Making of Evisceration Plague (2009) while their highest rated movie together was Cannibal Corpse: Global Evisceration (2011). They have not worked together since Cannibal Corpse: Global Evisceration (2011).