(3) No athlete has ever dominated a sport like Kelly Slater has professional surfing. The 40-year-old has a record 11 world titles and 52 ASP wins. Plus he is a leader away from his sport with philanthropic efforts to help conserve ocean ecosystems.
(13) Sheckler has been winning contests, traveling the world and skating at a high level since he was 8. Sheckler has six X Games medals, including golds in Street (2008 and '10) and Park ('03).