How many movies have Lorenzo O'Brien and Pedro Armendáriz Jr. collaborated on?

They have worked on 4 movies together! Their first movie together was Walker (1987) while their highest rated movie together was Nurses on the Line: The Crash of Flight 7 (1993). They have not worked together since Nurses on the Line: The Crash of Flight 7 (1993). They are most known for their drama films together.