Glynn Turman is an American actor. First coming to attention as a child actor in the original 1959 Broadway production of A Raisin in the Sun, Turman is known for his roles as Lew Miles on the prime-time soap opera Peyton Place (1968–1969), high school student Leroy "Preach" Jackson in the 1975 coming-of-age film Cooley High, math professor and retired Army colonel Bradford Taylor on the NBC sitcom A Different World (1988–1993), and Baltimore mayor Clarence Royce on the HBO drama series The Wire. He received the Primetime Emmy Award for Outstanding Guest Actor in a Drama Series for his role on the HBO drama series In Treatment.