Complex sentence: In 2003, he was an assistant defensive coach for the San Francisco 49ers, and in 2004 he helped lead the Texas Longhorns to an 11--1 season and their first-ever Rose Bowl appearance and victory as the assistant head coach and defensive ends coach.
Split into simpler sentences: In 2003, he was an assistant defensive coach for the San Francisco 49ers. In 2004 he helped lead the Texas Longhorns to an 11--1 season and victory in their first-ever Rose Bowl as assistant head coach and defensive ends coach.