Complex sentence: As a result of winning the Olympic decathlon, Jenner became a national hero receiving the James E. Sullivan Award as the top amateur athlete in the United States, and being named the Associated Press Male Athlete of the Year in 1976.
Split into simpler sentences: As a result of winning the Olympic decathlon, Jenner became a national hero and received the James E. Sullivan Award as the top amateur athlete in the United States. He was also named the Associated Press Male Athlete of the Year in 1976.