Lewis vaulted into national attention in 1987 when he became the sport's first male National Amateur Champion. It was the start of an outstanding amateur career that included consecutive berths on Team USA (1988 and 1989) as well as success in and international competition. In the 1988 USBC Open Championships, he was a member of the Chilton Vending team that won the Team All-Events title and he partnered with fellow Hall of Famer Mark Jensen to win Regular Doubles. Also in 1988, he was bowling's representative in the 1988 Summer Olympic Games in Seoul, Korea, where bowling was conducted as an exhibition sport. He finished sixth in the individual competition. In 1989, he returned with Chilton Vending to win the team title and won a gold medal in trios and a silver medal in team in the 1989 FIQ American Zone Championships. He won his fourth USBC Open Championships eagle in 2001.