[4] In his junior season, Lewis averaged 17 points, 11 rebounds and 6 blocks per game, and was selected in the All-Metro First Team by the Washington Post.
[4] He averaged 21 points, 15 rebounds and 8 blocks per game, earning All-Metro MVP and first-team honors, and was selected as the Metro area Mr. Basketball by the Washington Touchdown Club.
[6] In the 1984 McDonald's All-American Boys Game he scored 4 points, all on free throws attempts, playing for the East team.
[7] Lewis chose to wear number 331 at Maryland and was selected as a starter by coach Lefty Driesell since his freshman year.
[8] In the quarterfinals of the 1985 ACC men's basketball tournament against Duke, Lewis scored a new career high of 16 points.
[2] He scored double figures in 13 games; he tied his career-high of 16 points twice in the season, against Ohio State and Georgia Tech.
[12] As a junior, Lewis gained an increased scoring load after the departure of Len Bias, who had left the team for the 1986 NBA draft.
[19] Lewis was considered one of the college basketball top defensive players when he returned to Maryland for his senior season; Sporting News ranked him the third-best power forward in college basketball behind Danny Manning and J. R. Reid, and included him in the preseason All-American watchlist.
In April 1988 he was selected in the United States Basketball League (USBL) draft in the 6th round (50th overall) by the Jersey Shore Bucs.
In a June 28 article, the Baltimore Sun reported that Lewis was projected to be a second-round pick in the NBA draft:[23] he was selected in the third round (62nd overall) by the Chicago Bulls.
[26] Lewis then decided to sign for the Rockford Lightning in the Continental Basketball Association (CBA), the main minor league in the United States.
In his rookie season as a professional player, Lewis played 52 out of 54 games of the 1988–89 CBA season, averaging 8.5 points, 8.5 rebounds, 1.5 assists, 1.1 steals and 2.4 blocks:[27] he ranked third in the CBA in blocks (126 in 52 games for a 2.4 average) behind John Campbell of the La Crosse Catbirds and Jerome Henderson of the Topeka Sizzlers.
[28] He also participated in the playoffs, appearing in 16 games and averaging 10.2 points, 8.9 rebounds, 1.6 assists, 1 steal and 1.8 blocks;[27] his team reached the CBA finals, where they lost to the Tulsa Fast Breakers.
In 1989, Lewis moved to France for the first time in his career, and signed for Reims Champagne Basket, a team that competed in the Nationale A1, the first level of French basketball.
On February 24, 1990, he recorded the only quadruple double in French league history against Lorient, with 20 points, 11 rebounds, 12 steals and 10 blocks.
In his first season with the club, Lewis averaged 16.7 points, 10 rebounds, 1.5 assists and 3 blocks, while playing a career-best 38.3 minutes per game and shooting 51.1% from three (made 24 out of 47 total attempts).
[37] For the following season Lewis played 21 games, averaging 9 points, 6.7 rebounds (10th in the Pro A), 2.1 assists, 1.7 steals (6th in the league) and 0.9 blocks (7th).
[38] In his last season with Nancy he appeared in 30 games and averaged 10 points, 8.6 rebounds (7th in the league), 2.8 assists and 1.4 blocks (4th).
In 2001 Lewis signed with Pau-Orthez, the team that had won the league title the previous season and was due to participate in the 2001–02 Euroleague.