On January 15, 1942, President Franklin Roosevelt penned the famous “green light” letter to Commissioner Kenesaw Mountain Landis. In the letter, President Roosevelt addressed Commissioner Landis’s query about playing baseball in the wake of the Second World War. FDR believed that playing the sport would be good for Americans, and he encouraged baseball owners to hold more night games in order to allow workers to attend games.

Notice that FDR says a game is only two to two and a half hours when this is written. Times have changed.
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i guess the cost thing holds true with mlb tv and radio being such a bargain. but tickets and beer is a whole nother story.