Lachemann had a nine-season minor league catching career, interrupted by two years of military service, in the Brooklyn/Los Angeles Dodgers farm system. In his best season, 1960 with the Great Falls Dodgers of the Class C Pioneer League, Lachemann batted .307 and swatted a career-high 10 home runs. During his minor league career, Lachemann hit .253 with 30 homers. He stood 5 ft 9 in (1.75 m) tall, weighed 190 pounds (86 kg), batted left-handed and threw right-handed.[3]
As a manager of Class A, Short Season A and Rookie-level teams in the farm systems of the Angels and San Francisco Giants for 14 seasons, Lachemann's teams compiled a 630–781 (.446) record.
In 1995 and 1996, Bill Lachemann served as bullpen coach on the staff of his brother Marcel, then skipper of the Angels.[4]
Lachemann died on February 3, 2024, at the age of 89.[5]