Mark "The Animal" Mendoza (born Mark Glickman, July 13, 1955) is an American rock bassist and a member of the American heavy metal band, Twisted Sister. He joined the band on October 31, 1978, after he left The Dictators. He also briefly played in Blackfoot in the early 1990s.
Mendoza played the bass guitar on all of Twisted Sister's major label releases. He remixed Under the Blade when it was re-issued by Atlantic Records, and produced and mixed Still Hungry and A Twisted Christmas.
Growing up in West Hempstead, New York, Mark 'Mendoza' Glickman attended George Washington Middle School and West Hempstead High School, both in West Hempstead, New York and graduated in 1974. His picture can be found in the yearbook for West Hempstead High School for 1974. In April of 1973, Mark held a job in the camera department of S. Klein in the same town. While going to school, he had naturally curly hair and wore it in a somewhat Afro style as well as black Horn-rimmed glasses.