On December 3, 1968, After the dominance of pitching last season, Major League Baseball’s Rules Committee adopts a series of changes designed to increase the amount of offensive run production in both leagues.

In the most significant alterations, the committee agrees to decrease the size of the strike zone and lower the height of the pitcher’s mound from 15 inches to 10 inches. The rules changes will result in increased run-scoring in 1969 and by 1970 it causes drastic changes.

 

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