Freestyle motocross rider and off-road truck driver who won his fourth X Games gold medal in 2012.
He began riding motorcycles with his father at age 2.
He was featured on MTV's True Life: I Have Tourette's Syndrome.
He married Susie Stenberg in 2006. He has three children named Katrina, Savy and Sayler.
He and Shaun White both won gold medals at the 2006 Winter X Games.