Robbie Rist (born April 4, 1964) is an American actor. He is known for playing Cousin Oliver in The Brady Bunch, Martin in Grady and "Little John" in Big John, Little John. Rist is also known for voicing assorted characters in television shows, games and movies, including Stuffy, the overly-proud stuffed dragon in Doc McStuffins, Whiz in Kidd Video, Star in Balto, Maroda in Final Fantasy X, Choji Akimichi in Naruto, and Michelangelo in the films Teenage Mutant Ninja Turtles (1990), Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991), Teenage Mutant Ninja Turtles III (1993), and Casey Jones (2011). Additionally, he and director Anthony C. Ferrante provided music for the Sharknado film and the theme song for the Sharknado franchise. He played Ted Baxter's adopted son on The Mary Tyler Moore Show. Early Life Rist was born in La Mirada, California on April 4, 1964. Career Acting As a child, Rist played Cousin Oliver in the final six episodes of The Brady Bunch. With the regular children all growing older, his inclusion was intended to reintroduce a cute, younger child to the series. However, the idea backfired as most viewers disliked the Oliver character and the plan became moot as ABC had opted to not renew the series even before his debut. This gave rise to the TV term "Cousin Oliver Syndrome", also known as "add-a-kid". Oliver uttered the final line of the final episode: "Me! Cousin Oliver! / Gosh it was only a suggestion," but the character and Rist were subsequently omitted from later original-cast revivals of the series. After The Brady Bunch, he appeared as Glendon Farrell in Lucas Tanner starring David Hartman, "Little John" in the Saturday Morning series Big John, Little John, Tommy in the series premiere for the short-lived CBS drama series Bronk, and Martin in the short-lived Sanford and Son spin-off Grady. During 1975-77, Rist played David, son of Ted Baxter (Ted Knight) on The Mary Tyler Moore Show. He also appeared in three episodes of The Bionic Woman. In 1980, Rist played "Dr. Zee" on Galactica 1980. He made four guest appearances on CHiPs and the short-lived CBS series Whiz Kids, and also played "Booger" in a failed Revenge of the Nerds TV pilot. In 1986, Rist had a notable supporting role as Milo in the action film, Iron Eagle which was a box-office hit despite being critically panned. As