Complex sentence: Ryan Max Riley (born May 15,1979) competed on the World Cup for seven years and was a two-time US National Champion as an athlete on the U.S. Ski Team in the freestyle skiing events of moguls and dual moguls.
Split into simpler sentences: Ryan Max Riley (born May 15,1979) is an American freestyle skier. He was an athlete on the U.S. Ski Team; he competed in the freestyle skiing events of moguls and dual moguls.