Complex sentence: His best season was 2001, when he led the Ducks to an 11-1 record and a victory in the Fiesta Bowl, finishing the season ranked second in both major polls, the highest final ranking in school history.
Split into simpler sentences: His best season was 2001, when he led the Ducks to an 11-1 record and a victory in the Fiesta Bowl. They finished second in both major polls, the highest final ranking in school history.