Donald Roeser, also known as Buck Dharma, is an American musician and songwriter best known as the lead guitarist and co-founder of the rock band Blue Öyster Cult. Born on January 12, 1947, in New York, he has been a significant figure in the music industry since the early 1970s. Roeser is recognized for his distinctive guitar work and contributions to the band's classic hits. Throughout his career, Roeser has been involved in various musical projects and collaborations. He has also released solo albums, showcasing his versatility as an artist. His influence extends beyond Blue Öyster Cult, as he has inspired many guitarists and musicians in the rock genre.