Randy Castillo (1963-2020) was an influential American drummer known for his work in the rock and heavy metal genres. He gained prominence in the late 1980s and 1990s, showcasing his exceptional drumming skills with several high-profile bands. Castillo is best known for his tenure with Ozzy Osbourne, where he played on the albums "No More Tears" (1991) and "Live & Loud" (1993). His energetic and powerful drumming style contributed significantly to Osbourne's sound during this era. In addition to Osbourne, Castillo worked with notable artists such as Mötley Crüe, Lita Ford, and Joan Jett, further solidifying his reputation in the rock community. He also collaborated with artists across different genres, including pop and alternative rock, which highlighted his versatility as a musician. Castillo's impact on music lies in his ability to bring a dynamic, aggressive energy to live performances and studio recordings, influencing a generation of drummers in the rock and metal scenes. His work continues to be celebrated, and he is remembered as a key figure in the evolution of hard rock drumming.