Signed by his hometown Cardinals in 1941, Diering's most active year with St. Louis
was 1949, when he hit .263 in 131 games. In December 1951, Diering and Max Lanier
were traded to the Giants for Eddie Stanky. A late-inning defensive replacement in
New York, Diering had only 23 at-bats in 1952. In 1954, Baltimore's first season,
Diering was named the most valuable Oriole, batting .258.