[1] In 1941, Klemmer set the world record for the 400 metres, running 46.0 around a single turn[2] at the University of Pennsylvania Franklin Field on June 29, 1941.

[1] Klemmer was the USA National Champion at 440 yards in 1940 at age 19 and again in 1941, representing the San Francisco Olympic Club.

[4] Klemmer played for the 1945 Great Lakes Navy Bluejackets football team as a halfback under head coach Paul Brown.

[5] He served as the head football coach at City College of San Francisco (CCSF) from 1946 to 1961.

Klemmer was born and raised in San Francisco, where he graduated from Galileo High School in 1939.