1994 won Dorival for the USA the silver medal at the Junior World Championships in the 110- meter hurdles. In the following years he improved continuously, but given the competition in the U.S., he could not qualify for major international events.
In July 1999 he took the nationality of Haiti, the State of origin of their parents.
Dudley Dorival finished at the Olympic Games 2000 7th place in the 110- meter hurdles, the first Endkampfplatzierung a Haitian in athletics since 1928. At the Olympics 2004 he came to the semifinals.
At the World Indoor Championships in 2001, he took over 60 meters hurdles the 7th Place.
His great hour struck then at the 2001 World Championships when he with his personal best of 13.25 s won the bronze medal behind Allen Johnson (USA) and Anier Garcia ( Cuba). This was the first winning a medal at the world championships in athletics for Haiti, since Silvio Cator at the Summer Olympics in 1928 won silver in the long jump.
At the World Championships in Paris in 2003, in Helsinki in 2005 and 2007 in Osaka, he failed as early as 1999 in Sevilla in the semifinals.
At a height of 1.85 m his competition weight is 77 kg.