Don Lenhardt was born in Alton, Illinois.
Lenhardt (shown in this 1949-50 Alerta premium which mistakenly identifies him as "Jimmy Lenhart") played two seasons in the Cuban League with Habana: 1949-50 and 1953-54.
According to Who's Who in Cuban Baseball, 1878-1961, Lenhardt led the league with 15 home runs while batting .314 in 1949-50. He batted .304 in 1953-54.
In five major-league seasons, Lenhardt with the Browns, White Sox, Red Sox, Tigers and Orioles between 1950-54.