Complex sentence: Their son Roger Brown, who graduated from Dartmouth College in 2004, was also an All-American, was the 2002 NCAA slalom champion and competed on the U.S. Ski Team.
Split into simpler sentences: Their son Roger Brown, a 2004 graduate of Dartmouth College, was also an All-American. He was the 2002 NCAA slalom champion and competed on the U.S. Ski Team.