This is a list of Major League Baseball players who died in wars. The player's team refers to the last team the person played for.

Spanish-American War Name Age Yeardied Position Team Last yearplayed Service Notes Bill Stearns 45 1898 Pitcher and outfielder Washington Nationals 1875 U. S. Army Stearns was the first Major League Baseball player to die in a war. He was a member of the Grand Army of the Republic, which means he served in the American Civil War, even though he was only 12 years old at the end of the war. At the age of 45, he volunteered to serve in the Spanish–American War, but became ill during the American landing on Puerto Rico and died at home several months later.

World War I Name Age Yeardied Position Team Last yearplayed Service Notes Tom Burr 24 1918 Outfielder New York Yankees 1914 U. S. Army A pilot, he crashed after a mid-air collision. Harry Chapman 32 Catcher St. Louis Browns 1916 Died of influenza-induced pneumonia, a victim of the Spanish flu. Larry Chappell 28 Outfielder Boston Braves 1917 U. S. Army Died of the Spanish flu. Harry Glenn 28 Catcher St. Louis Cardinals 1915 Died of pneumonia. Eddie Grant 35 Third baseman New York Giants 1915 Killed by a shell in the Forest of Argonne while leading a unit searching for the "Lost Battalion". Newt Halliday 21 First baseman Pittsburgh Pirates 1916 U. S. Navy Died of tuberculosis. Ralph Sharman 23 Outfielder Philadelphia Athletics 1917 U. S. Army Drowned while swimming. Bun Troy 30 Pitcher Detroit Tigers 1912 Shot in the chest during the Meuse–Argonne offensive.

World War II Of the more than 500 major league players who served in the military in World War II, two were killed.

Name Age Yeardied Position Team Last yearplayed Service Notes Elmer Gedeon 27 1944 Outfielder Washington Senators 1939 U. S. Army Shot down over France while piloting a Martin B-26 Marauder bomber. Harry O'Neill 1945 Catcher Philadelphia Athletics U. S. Marine Corps Killed by a sniper during the Battle of Iwo Jima.

Korean War One Major Leaguer was killed in the Korean War. Name Age Yeardied Position Team Last yearplayed Service Notes Bob Neighbors 34 1952 Shortstop St. Louis Browns 1939 U. S. Air Force Piloted a Douglas A-26 Invader light bomber which was hit. The crew bailed out and were initially listed only as missing in action.

References