Acker was signed as an amateur free agent by the New York Giants in 1948 and played for two of their minor league affiliates until 1950, when the Buffalo Bisons drafted him in that year's minor league draft. After spending one season with the organization, he was traded to the Cincinnati Reds in October 1951, the same month he drafted into the US Army.
Acker became an amateur free agent signed by the New York Giants in 1948 and played for two minor league affiliates of their team until 1950. The Buffalo Bisons selected him in that year's minor league draft, after which he was traded to the Cincinnati Reds in October 1951, the same month he was drafted into the US Army.