Complex sentence: He was the 2010 U.S. Junior Championships combined champion, won the downhill title in the 2013 U.S. Championships, and competed for the United States in the 2014 Winter Olympics in Sochi, Russia.
Split into simpler sentences: He was the 2010 U.S. Junior Championships combined champion, and won the downhill title in the 2013 U.S. Championships. Goldberg competed for the United States in the 2014 Winter Olympics in Sochi, Russia.