| Duncan ('Furious D')|
|Color|| Mane: Gray (former) |
|Owner||Former: Bart Simpson|
|Job|| Former: Diving horse|
|First Appearance||"Saddlesore Galactica"|
|Voiced by||Jim Cummings|
Duncan, otherwise known as his nickname Furious D was a racehorse. Bart rescued him from a fair, where he was forced to jump off a diving board. He became a very successful racehorse at the Springfield Downs. After winning the race, he became a stud and lived with a female horse.
Behind the Laughter Edit
Duncan's vocal effects were provided by Jim Cummings. His nickname, “Furious D”, resembles the heavy metal rock band, Tenacious D.