GRIND is an all-original heavy metal band from San Antonio, Texas. Founded in 1985 as Assassin, the band has played as GRIND since 1990. The lineup: Albert on lead vocals, Robert "Bob" Perez on lead guitar, Rudy on bass, and Joe on drums. Rudy also writes the songs, and Bob is the founder and lead guitarist of Séance, another San Antonio heavy metal band.