R. J. Herrera

Ralph J. (R.J.) Herrera is a heavy metal drummer. He is best known for being the drummer of [...] Tendencies between the years of 1984 and 1991. After [...] Tendencies, he joined Uncle Slam, a crossover thrash band featuring ex-[...] members. While in [...] he used double bass drum kits, a feature often associated with metal music as opposed to the hardcore punk [...] was associated with when he joined. Herrera, along with Rocky George and Mike Clark, was largely responsible for the bands transition to thrash metal. He left in 1991 due to unspecified personal differences, but was thanked in the sleeve of the band's next album The Art of Rebellion for "8 outstanding years".

He seemed to have had a very cheery and happy appearance and was frequently pictured smiling, which made him somewhat popular with [...] fans. He is not related to Fear Factory's drummer Raymond Herrera, despite the fact that they have the same last name and are both from southern California.