Jason William Mizell (January 21, 1965 – October 30, 2002), better known by his stage name Jam Master Jay, was an American musician and DJ. He was the DJ of the influential hip hop group Run–D.M.C. During the 1980s, Run-D.M.C. became one of the biggest hip-hop groups and are credited with breaking hip-hop into mainstream music.
For his skill re-working riffs from classic guitar records, he was ranked No. 10 on Spin's list of the "100 Greatest Guitarists of All Time. On October 30, 2002, while recording new music at his studio in the Jamaica section of Queens, New York City, Mizell was shot and murdered by an unknown assailant.