Born in Pontiac, Michigan, Pratt was in the United States Army as a Sergeant in the Office of Strategic Services during World War II, from 1943 to 1946.

He was a judge of the 6th Judicial Circuit Court of Michigan from 1963 to 1970.

[1] Pratt was nominated by President Richard Nixon on October 7, 1970, to the United States District Court for the Eastern District of Michigan, to a new seat created by 84 Stat.

He was confirmed by the United States Senate on November 25, 1970, and received his commission on December 1, 1970.

Pratt served in that capacity until his death of cancer on February 7, 1989, at his home in Bloomfield Hills, Michigan.