He turned professional in 1987, aged 15, signing a contract with the factory Cagiva team, widely acclaimed as a future world champion.
Disenchanted with the sport, he briefly pursued a modelling career in New York, before receiving an offer to return to Europe, competing for the Suzuki UK team.
Dobb's title victory was a welcome relief for British motocross in 2001, with much of the domestic season cancelled due to the country's foot and mouth outbreak.
He moved to the premier MX1 class in 2002, but injury, and an uncompetitive KTM 250 machine, meant that he was unable to challenge Stefan Everts for the title.
However, unable to mount a serious title challenge, Dobb retired from professional motocross midway through the 2004 season.