Brian Posehn
From Halopedia, the Halo wiki
Brian Posehn is an American actor, writer, and soundtrack artist. He was born on July 6, 1966 in Sacramento, California, USA. He has many credits to his name, mostly for producing comedy movies and television shows. He has also appeared as himself in a number of productions and television shows, such as Late Night with Conan O'Brien.
He was one of several actors credited as a Grunt in Halo 2.
