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 briefly played in Blackfoot in the early 1990s. Mendoza is also currently a member of Joe Rock and The All Stars, contributing bass and vocals to this band that features front man Joe Rock of WBAB radio on Long island. He is also a co-host on The Real Radio Show with Frankie Dee.