Shepard pitched 5 1/3 innings in the second game of a doubleheader for Washington against Boston on August 4, 1945 and gave up one run on three hits. The Senators were contenders for the pennant that year and Shepard was not used in a game again.
He later went on to serve as a spokesman for disabled veterans and also worked for IBM and Hughes. Shepard made numerous public appearances in his retirement to discuss his World War II experiences and his time with the Senators.
Shepard's only game was made possible by the only major league appearance of one Joe Cleary, who gave up 7 runs while getting only one out and finishing his career with an ERA of 189.00, the highest finite ERA in major league history.