#5 Kenny Roberts Jr.
Kenny Roberts Jr, a former American Motorcycle road racer, is a 500cc world championship winner which he won in the year 2000.
He and his father, Kenny Roberts Sr, are the only father-son duo to have won the 500cc world championship. This is not the only achievement of the junior Roberts as he was inducted into the FIM MotoGP hall of fame in 2017.
Roberts started off his racing career in the 250cc class at Willow Springs in 1990. It was an amazing start for the youngster as he won five races in his debut season. By 1993, he was a full-time racer for the Marlboro-Yamaha team.
Roberts had a poor 1996 season as he finished thirteenth overall and was sacked by Yamaha. He then joined his father's team in 1997 where he struggled for two years as he finished sixteenth and thirteenth.
It was in 1999 that Suzuki signed Roberts for their Grand Prix team. His debut race for Suzuki resulted in a surprise win and defeated Michael Doohan.
He defeated Doohan again in Japan. He was on a winning streak which made him a strong contender for the title. Unfortunately, Roberts lost consistency and eventually ended up finishing second in the championship behind Alex Criville.
In the year 2000, the only challenge which Roberts faced from Valentino Rossi who was a rookie at that time.
Roberts won four races and finishing on the podium position five times. He eventually ended up winning the championship.
He is also the first son of a former racer to have won the world championship. After that, he lost consistency and did not win any race for the next few seasons. He was replaced by Chris Vermeulen in the Suzuki team.