In 1974, Mick Doohan first sat on a motorcycle, following his older brother Col, at the age of nine. In the late 1980s he demonstrated his talent in the Australian and Japanese Superbike championships and in the 1988 season also in the newly created Superbike World Championship . In 1989 he made his debut in the motorcycle world championship on a 500cc factory machine as a teammate of world champions Wayne Gardner and Eddie Lawson . After finishing ninth in his debut year, he steadily improved and finished his second season in third place. In the same season he won his first race on the Hungaroring at the Hungarian Grand Prix .
1992 looked like it was going to be Doohan's year. He won five of the first seven races and was already leading the championship by 53 points. At the eighth race of the season in Assen , the Netherlands , he fell so badly in qualifying that he broke his right leg and the season was over for him. He only gave up his world championship lead in the last race and was runner-up, four points behind. In the following season he started with a considerable lack of fitness and was only able to build on his old achievements in the second half of the season. The bottom line was that it was enough for fourth place in the world championship.
Five world championships in a row
In the 1994 season Mick Doohan won nine out of 14 races and was world champion in the 500 cc class for the first time in his career. In the following year he managed to defend his title and in 1996 he won his third world title in a row, standing on the podium twelve times in 15 races. In 1997 he won his fourth title in a row, which only Giacomo Agostini and Mike Hailwood had previously achieved. In 1998 he finally won his fifth title in a row.
1999 started the season with a fourth and a second place only mediocre for his standards. In training for the third round of the season on the Circuito de Jerez in Spain , he fell in turn four at around 200 km / h and broke his right leg again, which was already damaged. Two plates were inserted and twelve screws were screwed into his leg. He announced his resignation before the end of the season.