How many movies have Jeffrey A. Humphreys and Sylvester Stallone collaborated on?

They have worked on 4 movies together! Their first movie together was Bullet to the Head (2012) while their highest rated movie together was Guardians of the Galaxy Vol. 3 (2023). They have not worked together since Guardians of the Galaxy Vol. 3 (2023). They are most known for their action films together.