Bruce Thomas is an American actor. He is well known for being the motion capture actor of Master Chief in Halo 4, Halo 5: Guardians and Halo Infinite as well as portraying Russell Adler in Call of Duty: Black Ops Cold War. He first came to prominence for portraying the character of Batman in a series of commercials for General Motors' OnStar service that aired from 2000 to 2002. Wikipedia