[3] A 5 ft 10 in (1.78 m) guard, Opper earned All-Southeastern Conference honors in all three varsity seasons he played.
[3] He helped guide Kentucky to the 1937 SEC Tournament championship and then the 1938 regular season title.
[3] In his first professional season, Opper joined the Detroit Eagles of the NBL and averaged almost four points per game.
[3] The Philadelphia Sphas were one of the most dominant ABL teams in the 1930s and 1940s, winning seven championships in 15 years.
[3] After finishing with a career-high 347 points in 1946–47, which was second on the team in scoring, he moved on to the Jersey City Atoms for the first 10 games of the 1947–48 season.