Motocross racer who competed from 1988 to 2006; 10-time world champion in four different classes.
He started riding at age 4, made his world championship debut at age 17, and won his first world championship at age 19, a 125cc race in 1991.
He was just the second person ever to win world championships in 125cc, 250cc, and 500cc events.
He married his longtime girlfriend, Kelly Tureluren, in 2013.
He often had close races with fellow star and rival Ricky Carmichael.