Years Active: Early '90s
Label: Loud Records
Best Known Song: "Freestyle with Stretch & Bobbito"

Along with Matty C, the other O.G. The Source-alum-turned-A&R legend who got it in live on The Stretch Armstrong Show, native New Yorker Rob Tewlow was known to light up the m-i-c here and there in the late '80s and early '90s. That said, Reef's real contributions to hip-hop came not from behind a mic, but behind a desk and then behind the boards. As an A&R, Reef signed the Artifacts and Junior Mafia, among others. And as a producer he lent a hand to Lil Kim's classic "Big Momma Thang" and 50 Cent's monster "What Up Gangsta." Today he runs Eminem's satellite radio station SHADE45 like a boss.