As mentioned in a different thread, Jack Chevigny was one of two Texas football coaches to finish with a losing record. But he had the distinction of falling at Iwo Jima. He's a legend, being part of the "win one for the Gipper."
https://en.wikipedia.org/wiki/Jack_Chevigny
"John Edward Chevigny (August 14, 1906 – February 19, 1945) was an American football player, coach, lawyer, and United States Marine Corps officer who was killed in action on the first day of the Battle of Iwo Jima in World War II. He is best known for scoring the famous "that's one for Gipper" touchdown for Notre Dame on November 10, 1928 versus Army at Yankee Stadium. One of the Great Depression-era football stars, he was one of the best blocking backs for Knute Rockne's Notre Dame football team in the 1920s. Chevigny later served as the head coach of the NFL's Chicago Cardinals in 1932 and the head football coach at the University of Texas from 1934 to 1936...."
And another legend about him-as UT football coach he lead them to a famous upset of Notre Dame in South Bend:
"...Another legend surrounding Chevigny is that, after the 1934 football victory, he had been presented a fountain pen with the inscription, "To Jack Chevigny, a Notre Dame boy who beat Notre Dame", and that on September 2, 1945, this pen was discovered in the hands of one of the Japanese officer envoys at the surrender of Japan on the battleship USS Missouri. ..."