Complex sentence: He set the school record for sacks with 18.5 as a junior, and as a senior broke it with 23 and was the Defensive Player of the Year for the Orange County Register.
Split into simpler sentences: He set the school record for sacks with 18.5 sacks as a junior. As a senior, Matt broke his own record with 23 and was named "High School Defensive Player of the Year" by the Orange County Register.