Sports such as soccer, baseball and football were popular during the 1940s. Most professional sports were effected in various ways by World War II. Some sports lost professional players to the military, while other sports did not have proper materials due to shortages in wood and rubber.
Baseball was the most popular sport throughout the 1940s, and it was not heavily effected by WWII, as many other sports, explains ThisGreatGame.com. President Franklin D. Roosevelt wrote the "Green Light Letter," which assured baseball would be able to carry on during the war. There was also a professional women's league called the "All-American Girls Baseball League."