Richard Alfonso Martinez (born June 18, 1961), better known by the stage name Oz Fox, is the lead guitarist of the Christian glam metal band Stryper. Martinez' high school friends called him Oz in honor of Ozzy Osbourne due to his ability to emulate the vocals of Osbourne while playing Black Sabbath covers in his pre-Stryper days. He was recruited by the Sweet brothers in 1983 to form what would become Stryper. As a founding member of the band, Fox recorded and toured with Stryper until the band's first break up in 1992 but has since rejoined the band.