He was named to the first-team All-Pacific-10 Conference team after his junior and senior seasons. As a senior, Matthews earned consensus All-America honors and won the Morris Trophy, which is awarded to the best lineman in the conference.
Matthews was named to the first-team All-Pacific-10 Conference team for his junior and senior seasons, earning consensus All-America honors and winning the Morris Trophy, which is given to the best lineman in the conference.