Matthew Pike (born June 3, 1972) is an American musician best known as the guitarist of stoner metal/doom metal band Sleep and the frontman of High on Fire. With High on Fire, Pike won the 2019 Grammy Award for Best Metal Performance for the song "Electric Messiah". As a guest star, Pike provided the voices of Pickles' father and a Klokateer in Metalocalypse on late-night block Adult Swim.