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.
After Stryper, Fox played in several projects, including his own band, Sindizzy where he played rhythm guitar and sang lead vocals. SinDizzy, which released an album in 1998 titled He's Not Dead, included former Stryper bassist Tim Gaines, drummer John Bocanegra and LA guitarist Bobby MacNeil. SinDizzy was a departure for Fox as it allowed him to explore his writing and playing from a much different perspective than in his prior work. SinDizzy would be put on hiatus however due to Fox and Gaines being asked to rejoin Stryper for their reunion in 2003 in support of the album 7 after the widespread acceptance and excitement generated by the first 'Stryper Expo'. Though Gaines would elect to leave the band, Fox, together with brothers Robert and Michael Sweet and newcomer bassist Tracy Ferrie, is still recording and touring with the group. Fox's latest work is on Stryper's Murder by Pride album released in July 2009.