As emotionally fragile as he was domineering, Calvin was a large force in the Kyle’s household. Being very immature, but very physically large was something that made Calvin very unpredictable.
His power came from Lester Speight, a former professional football player and professional wrestler. Before MW&K, Lester had appeared in movies, shows, and commercials, and once the show ended, he’s just continued his grind. With varying genres, like action movies (Transformers: Dark of the Moon, and Faster), along with comedic roles (“Harold & Kumar Escape from Guantanamo Bay,” and “Knucklehead”), it seems that Lester Speight has been able to show his diversity in acting.