U.S. Trotting Triple Crown wins: Hambletonian Stakes(1987, 1988, 1990, 1995, 1998, 2006) †Yonkers Trot(1987, 1998, 2014)Kentucky Futurity(1989, 1992, 1993, 1994, 1997, 2004, 2007, 2014) † U.S. Pacing Triple Crown wins: Little Brown Jug(1982, 1993, 1995)Cane Pace(1985, 1989, 1990, 2002, 2004) †Messenger Stakes(1986, 1987, 1990, 1994, 1995, 1998, 2000, 2004) † John Duncan Campbell (born April 8, 1955, in Ailsa Craig, Ontario) is a retired Canadian harness racing driver.

Dunc had two sons Ray and Jack Campbell with his family near London, Ontario.

John has won more dollars-in-purses at any North American Track (i. e, The Meadowlands Racetrack) than any jockey or driver.

In 1976, harness racing was changed forever by the opening of the Meadowlands Racetrack in East Rutherford, New Jersey.

The catch-driver was usually younger, lighter and more athletic and was able to make the horses go faster than the previous generation of driver.