Earned acclaim during the mid-1940's as one of the top high school basketball players in Alabama. He led Lexington High School to an undefeated regular season in 1944, with a 12-0 record. The Bears won the district and moved on to the state tournament where they lost to Scottsboro 32-29 in the championship game. Thompson scored 61 points in the state tournament, which at the time matched all schools, regardless of enrollment. He scored 265 of the team's 801 points that season. Lexington was 15-5 the next year, losing in the district. He scored 324 of the team's 816 points that season. He was named to numerous all-star teams, including all-state. He was offered a scholarship by Adolph Rupp at Kentucky, but decided to pursue a banking career.