From BR Bullpen
The 1940s were a time of significant change for baseball. The decade began with the starring performance of players like Joe DiMaggio and the emerging Ted Williams, who had Major League Baseball's last .400 batting average season in 1941. From 1942-45, baseball was shaken by World War II. Over 150 players from the Japanese Professional Baseball League and the minor leagues lost their lives during the conflict. Many leagues shut down operations during the War, though Franklin D. Roosevelt encouraged the major leagues to continue functioning, which they did throughout the period. One unique league did start up during this period, the All-American Girls Professional Baseball League, founded in 1943, as women filled a professional baseball gap in the Midwest when so many male players went to War.
After the War, there were a couple major events. Jorge Pasquel and other Mexican League owners signed major league players like Max Lanier, Sal Maglie and Bobby Estalella, the top Cuban players of the era and some Negro League stars (the latter two groups had been active in Mexico for some time) to form a strong challenge to MLB supremacy. Legal entanglements arose and those white players who jumped contracts were blacklisted and barred from returning for a couple of years. The talent level was not as high as Mexico had seen in 1940-1941, when people like Josh Gibson and Cool Papa Bell were playing, but it has been the most-discussed era of the Liga.
Another key event was the signing by Branch Rickey of Jackie Robinson of the Kansas City Monarchs, a move that integrated baseball. Robinson debuted with the Montreal Royals in 1946 and four other ex-Negro Leaguers played in the Brooklyn Dodgers chain, most notably Roy Campanella. The move was opposed by many Southern fans and some leagues in the region never integrated, eventually leading to their collapse, most notably the Southern Association. After leading Montreal to the International League title in 1946, Robinson made his Major League debut on Opening Day of 1947. While he encountered significant hostility, Robinson won the support of teammates and of Commissioner Happy Chandler, and by the end of the season, the American League had also integrated, with Larry Doby being the ground-breaker, while a number of other black players had made their Major League debut. The movement was so rapid that by the end of the decade, the Negro Leagues were on the verge of collapse, as all of its prominent players had been signed to contracts in organized baseball.
Many minor leagues were started and re-started after the War, creating a brief golden age for the minors which would be cut short in the dark age 1950s due in large part to television changing Americans' entertainment habits.
|Years||American League||National League||Postseason||Japan|
|1940||1940 AL||1940 NL||1940 WS||1940 in Japan|
|1941||1941 AL||1941 NL||1941 WS||1941 in Japan|
|1942||1942 AL||1942 NL||1942 WS||1942 in Japan|
|1943||1943 AL||1943 NL||1943 WS||1943 in Japan|
|1944||1944 AL||1944 NL||1944 WS||1944 in Japan|
|1945||1945 AL||1945 NL||1945 WS||1945 in Japan|
|1946||1946 AL||1946 NL||1946 WS||1946 in Japan|
|1947||1947 AL||1947 NL||1947 WS||1947 in Japan|
|1948||1948 AL||1948 NL||1948 WS||1948 in Japan|
|1949||1949 AL||1949 NL||1949 WS||1949 in Japan|
 Further Reading
- Steven R. Bullock: Playing for Their Nation: Baseball and the American Military during World War II, University of Nebraska Press, Lincoln, NE, 2004.
- Gene Fehler: Tales From Baseball's Golden Age, Sports Publishing LLC, Champaign, IL, 2000. ISBN 978-1582612478
- David Finoli: For the Good of the Country: World War II Baseball in the Major and Minor Leagues, McFarland, Jefferson, NC, 2002.
- Donald Honig: Baseball When the Grass Was Real: Baseball from the '20s to the '40s Told by the Men Who Played It, University of Nebraska Press, Lincoln, NE, 1993 (originally published in 1975). ISBN 0803272677
- Donald Honig: Baseball Between the Lines: Baseball in the '40s and '50s as Told by the Men Who Played It, University of Nebraska Press, Lincoln, NE, 1993 (originally published in 1976). ISBN 0803272685
- Bill James: "The 1940s", in The New Bill James Historical Baseball Abstract, The Free Press, New York, NY, 2001, pp. 197-219.
- Andy Jurinko and Christopher Jennison: Golden Boys: Baseball Portraits, 1946-1960, Skyhorse Publishing, New York, NY, 2012. ISBN 978-1616084509
- Roger Kahn: The Era, 1947-1957: When the Yankees, the Giants, and the Dodgers Ruled the World, Bison Books, University of Nebraska Press, Lincoln, NE, 2002 (originally published in 1993). ISBN 0803278055
- Bill Marshall: Baseball's Pivotal Era, 1945-1951, The University Press of Kentucky, Lexington, KY, 1999.
- William B. Mead: Even the Browns: Baseball During World War II, Dover Publications, Mineola, NY, 2010 (originally published in 1978).
- Jeff Obermeyer: Baseball and the Bottom Line in World War II: Gunning for Profits on the Home Front, McFarland, Jefferson, NC, 2013. ISBN 978-0-7864-7043-3
- James D. Szalontai: Teenager on First, Geezer at Bat, 4-F on Deck: Major League Baseball in 1945, McFarland, Jefferson, NC, 2009.
 Related Sites
-  Article on the effect of World War II on star batters' statistics in The Hardball Times.