Alexander Thomson Burr (November 1, 1893 - October 12, 1918) was a Major League Baseball player who was killed in World War I. Born in Chicago, Illinois, Burr attended Williams College, although he turned pro before he ever played a collegiate game. Burr made the New York Yankees roster as a pitcher under manager Frank Chance. However, his only game appearance for the Yankees (on April 21, 1914) came in center field. He had no fielding chances and did not have a plate appearance.
Burr returned to Williams after his pro career ended, but he volunteered to serve in the war before he graduated. He was killed in an airplane accident on October 12, 1918 while serving in the United States Army Air Service in Cazaux, France. Burr's plane crashed into a lake in flames; although the article at right indicates that his body was never found, in fact it was recovered after 12 days. He had been serving in France since November 1917 and was 24 years old at the time of his death.
Burr was one of five Major League Baseball players who were killed in World War I. The others were: Bun Troy‚ Larry Chappell‚ Eddie Grant‚ and Ralph Sharman. He was buried in France and his remains were later repatriated; his final resting place is currently unknown.