X Games

The future stars of action sports

6 of 13

Adam Cianciarulo

Photograph By Steve Cox

Motocross rider Adam Cianciarulo joined the Monster Energy Pro Circuit Kawasaki team last year at age 16. Now 17, this year he started his first complete supercross season -- racing in the 250 class -- with a series of wins. He won three of his first five races, holding a commanding lead in the overall standings until a shoulder injury put him out for the rest of the season.