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WILLIAM WEST/AFP/Getty Images
Power 100 rank: 100
Most recent notable achievement: 2008 X Games, 1st Place
Key sponsors: Oakley Eyewear, Red Bull, Panasonic
Why he's on the list: Now that Tony Hawk has retired, Sheckler may be the most prominent skateboarder on the planet. He turned pro in 2003 at the age of 14 after winning the X Games, Gravity Games, Vans Triple Crown, and Slam City Jam. He is currently the star of his own MTV reality show, The Life of Ryan, and with J.C. Penney has launched a clothing line, RS By Sheckler.
(This caption has been updated to amend the name of Sheckler's clothing line.)