Television
His first television appearance was on the 1970s CBS television show Barnaby Jones, playing a camp counselor for drug addicted youth. Subsequent appearances were on Good Times, What's Happening!!, and The Incredible Hulk. In 1977, he became a regular on the series The Richard Pryor Show, an NBC American comedy series. This then led to his 1982 appearance in WKRP In Cincinnati, in which Witherspoon played Detective Davies, on the fourth-season episode "Circumstantial Evidence".
In 1981, he appeared in the NBC police drama Hill Street Blues, as a man who tries to buy a hotdog from undercover Detective Belker. In 1991, he had an appearance on NBC's legal drama L.A. Law, in the episode "On Your Honor" as Mark Steadman. He appeared in You Again? as Osborne. Other television show appearances include 227, which was an NBC comedy about women who lived in a majority black apartment complex, and What's Happening Now!!, the sequel to What's Happening!!.
Witherspoon was also featured in the American television sitcom Amen (1988), as the bailiff. The show, which ran on NBC, was known for being one of the shows during the 1980s that featured an almost entirely black cast.
Next came spots on Townsend Television (1993), Cosmic Slop (1994), and Murder Was the Case (1994) as a drunk.
He later appeared in the 1997 Living Single episode "Three Men and a Buckeye" as Smoke Eye Howard. His largest role in a television series was on The Wayans Bros. (1995–1999) which aired on The WB and starred Shawn and Marlon Wayans, who played brothers Shawn and Marlon Williams. Witherspoon played their father, John "Pops" Williams.
He was also on the Kids' WB animation series Waynehead, which was about a young boy growing up poor in Harlem, New York City. The show, which aired on Saturday mornings, was based on creator Damon Wayans' life.
In 2003, Witherspoon made a showing on NBC's Last Comic Standing, a reality television show that selected the top comedian out of a group and gave him a contract, in the Las Vegas finals. That same year, he performed as Oran Jones in The Proud Family episode "Adventures in Bebe Sitting". He later guest-starred in an episode of Kim Possible. During this time, Witherspoon was also featured as Spoon in all 18 episodes of the comedy series The Tracy Morgan Show.
In 2004, he appeared in Pryor Offenses, a television movie where he played Willie the Wino. In 2005, he was seen in the Comedy Central talk show Weekends at the D.L. where he portrayed the character of Michael Johnson. That same year, he began starring in Aaron McGruder's animated series The Boondocks as Robert Jebediah "Granddad" Freeman; this Cartoon Network/Adult Swim series ran for four seasons. In 2006, he performed as Real Santa, a Christmas singer on the radio, in the television movie, Thugaboo: A Miracle on D-Roc's Street, a story of a group of kids who find the true meaning of Christmas. His next appearance was on The Super Rumble Mixshow in 2008. In 2011, he starred in a Final Destination spoof with Shane Dawson on YouTube. In May 2013, he was featured on "Saturday (skit)", from rapper Logic's 2013 mixtape titled Young Sinatra: Welcome to Forever. He later performed in another Aaron McGruder series, Black Jesus, portraying Lloyd, a homeless man.