Complex sentence: Though coach Hayden Fry left the school in 1978 with a 9-3 season, he also left it with a mounting athletics debt, and the team was subsequently demoted to Division I-AA status by the NCAA.
Split into simpler sentences: Though coach Hayden Fry left the school in 1978 with a 9-3 season, he also left it with a mounting athletics debt. The team was subsequently demoted to Division I-AA status by the NCAA.