Sean Gunn is known for his role as the Ravager Kraglin in both “Guardians of the Galaxy” films. Yet the actor is also the on-set motion reference for Rocket Raccoon in those movies. Gunn said he wasn’t expecting to play Rocket but his brother James Gunn gave him the role. According to Comicbook.com, he said the production team asked him to stand in for Rocket. They staff wanted the actors to interact with a live person rather than a dummy or other object.