In a dominating senior season, Mattos repeated as the Royals’ basketball MVP and an All-League selection as well as earning a Second Team All-CIF nod. 1976 also saw him playing for the Southern California All-CIF Southern California High School Basketball Team as well as the Southern California Olympic Development League, for which he was named First-Team All Star. Mattos owned 12 records in basketball over his junior and senior seasons, including the single season scoring average record at 26.2 ppg – the second highest average in the 4A Division. Additionally, Mattos and the Royals baseball team were the Channel League champions in that year.
Mattos was named the Outstanding High School Athlete for Basketball at the 1976 SBART Hall of Fame Banquet.
Mattos received a full athletic scholarship to Weber State where he was a four-year letterman and a four year starter from 1976-80. While at Weber State, Mattos participated in the NCAA Playoffs three years in a row (1977-80) and saw his team ranked No. 16 (1979) and No. 12 (1980) in theAP and Coaches’ Basketball Polls. Mattos was the single game assist leader (17) for the Wildcats while notching team and conference marks as the single season assist leader (212) and career assist leader (696). In his freshman year, Mattos was named to the Honorable Mention All Big Sky Basketball Team while garnering Second Team honors in 1979-80. He was a Second Team Academic All-American in 1979 and 1980. Mattos was the Weber State Academic Co-Scholar Athlete of the Year in 1980 and graduated cum laude with a degree in zoology and minors in mathematics and chemistry in 1981. He was accepted to the University of Utah medical school in 1981.
Mattos was inducted into the San Marcos High School Hall ofFame in 1987 and into the Weber State Hall of Fame in 1995 . Mattos’ proudest moments are winning a game in the NCAA Men’s Basketball Tournament, graduating from college and medical school and becoming a professor of surgery in 1995.
Mattos, a vascular surgeon, currently resides in Grosse Pointe, Mich., and is the Clinical Professor of Surgery, Educational Consultant in the Department of Surgery at the Wayne State University School of Medicine in Detroit.