Movies
* The Wiz (1978): Played the role of "The Wiz" in this iconic musical film adaptation of the Broadway play.
* Fast Times at Ridgemont High (1982): Played the role of "Mr. Hand" in this cult classic coming-of-age comedy.
* Beverly Hills Cop (1984): Played the role of "Sergeant Taggart" in this action comedy classic.
* The Jewel of the Nile (1985): Played the role of "Omar" in this action-adventure film.
* The Last Dragon (1985): Played the role of "Sho'nuff" in this martial arts film.
* A Different World (1987): Played the role of "Dr. Raymond" in this sitcom.
* The Distinguished Gentleman (1992): Played the role of "Max" in this political satire comedy.
* The Fresh Prince of Bel-Air (1990-1996): Played the role of "Geoffrey Butler" in this sitcom.
Television
* The White Shadow (1978-1981): Played the role of "Coach Reeves" in this drama series about basketball.
* Hill Street Blues (1981-1987): Played the role of "Sergeant Phil Esterhaus" in this police drama series.
* Miami Vice (1984-1989): Played the role of "Captain Tom Crockett" in this crime drama series.
* The Fresh Prince of Bel-Air (1990-1996): Played the role of "Geoffrey Butler" in this sitcom.
* Frasier (1993-2004): Played the role of "Dr. Evan Drake" in this sitcom.
* ER (1994-2009): Played the role of "Dr. David Morgenstern" in this medical drama series.
* Grey's Anatomy (2005-2011): Played the role of "Dr. Richard Webber" in this medical drama series.
This is not an exhaustive list, but it highlights some of DeForest Mapp's most notable roles in movies and television. He has been a prolific and respected actor throughout his career, showcasing his versatility and talent across various genres.