Graduated high school in 1941 and was promptly signed by the Boston Red Sox and sent to Canton, Ohio, class C team. Harry originally started as shortstop and gained renown as a pitcher. In 1947, Harry made the Boston Red Sox as a relief hurler. In 1950, Harry was traded to the St. Louis Browns. Traded to the Chicago White Sox in 1951, where he stayed until 1955. Traded back to the Red Sox in 1957, he was returned to the Pacific Coastal League. In 1959 the Red Sox gave him a scouting job until 1962 when he was made Red Sox pitching coach. After several years of scouting and coaching for the Atlanta Braves, and Pittsburg Pirates he hooked on with the Cincinnati Reds where he still remains as there Minor League pitching coach.
Fritz is married to the former Helen Uter, they have two children and reside in Kingston.