October 30, 1916|
|Died: March 13, 1995
|Bats: Right||Throws: Right|
|Negro league baseball: 1934, Baltimore Black Sox|
|Last professional appearance|
|1952, MLB minor leagues|
|Earned run average||2.98|
|Career highlights and awards|
|Member of the National|
|Baseball Hall of Fame|
|Election Method||Veterans Committee|
Leon Day (October 30, 1916 – March 13, 1995) was an American right-handed pitcher in the Negro leagues. He played for the Baltimore Black Sox, the Brooklyn & Newark Eagles, and the Baltimore Elite Giants.
He was elected to the Baseball Hall of Fame in 1995.
Day, born in Alexandria, Virginia, is noted for pitching a perfect season in 1937 (13-0) while playing for the Newark Eagles, and for his fastball. Day was also a good hitter and baserunner, batting .320 in 1937.
From 1935 through 1946 he appeared in a record seven East-West All-Star Games, and set an all-star record by striking out 14 batters. In 1942 Day set a Negro league record when he struck out 18 Baltimore batters in a single game - including Roy Campanella three times. Day's teammate Monte Irvin referred to him
When the Negro league was in the off-season, Day played winter ball in Puerto Rico. There he established a Puerto Rican record of 19 strikeouts.
During World War II Day served in the United States Army, landing on Utah Beach on D-Day. He was discharged in February 1946, and later that same month, he pitched an Opening Day no-hitter against the Philadelphia Stars.
Later life 
Day retired from baseball in 1955. He died of a heart attack in Baltimore, Maryland at age 78, just six days after learning he had been elected to the Baseball Hall of Fame. Leon Day was the 12th Hall of Famer chosen from the Negro leagues, and the seventh to be selected while he was still living.
- "Jackie, Satchel & Co". ESPN. Retrieved July 19, 2011.
- Ivice, Paul (2004-06-06). "Berra, baseball have D-Day legacy Former Yankee great was part of allied invasion". MLB.com. Retrieved 2008-12-25.
- Clark, Dick; Lester, Larry (1994), The Negro Leagues Book, Cleveland, Ohio: Society for American Baseball Research
- Hogan, Lawrence D. (2006), Shades of Glory: The Negro Leagues and the Story of African-American Baseball, Washington DC: National Geographic, ISBN 0-7922-5306-X
- Riley, James A. (1994), The Biographical Encyclopedia of the Negro Baseball Leagues, New York: Carroll & Graf, ISBN 0-7867-0959-6
- Treto Cisneros, Pedro (2002), The Mexican League: Comprehensive Player Statistics, 1937–2001, Jefferson, North Carolina: McFarland & Company, ISBN 0-7864-1378-6
- Leon Day at the Baseball Hall of Fame
- Negro league baseball statistics and player information from Baseball-Reference (Negro leagues)
- Baseball Library biography