Muscle Man

Mitchell "Muscle Man" Sorrenstein is a major character in Regular Show. He is one of the groundskeepers of the Park. He is a green, strong, and  humanoid, who is often seen with his best friend, Hi Five Ghost. He is 25 at the beginning of the series and 31 at the end. Muscle Man made his first debut as a cameo character in the Pilot. He made his first official appearance in "Just Set Up the Chairs". Muscle Man is voiced by Sam Marin.