Rev Run (Joe Simmons) shares the lead vocalist spot in the band. He goes by Rev after becoming ordained as a Pentacostal minister. DMC (Darryl McDaniels) was a foster kid who eventually heard Grandmaster Flash and the Furious Five and found his calling as a rapper. They eventually found Jam-Master Jay (Jason Mizell) to DJ in the band.
https://www.youtube.com/watch?v=5yp0uhUeNN0