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   Changing the Rules
   Chronology of Changes to Major League Baseball Official Rules

Table K: Rule Changes 1940-1949

Table K: Rule Changes 1940-1949
1940 A batter is no longer credited with a sacrifice fly. 10.09
1940 The pitcher is permitted to take two steps-one forward, one backward-as long as his pivot foot remains in contact with the rubber at all times. 8.01
1940 It is a balk if a pitcher throws or fakes a throw to an unoccupied base. 8.02
1940 The umpire assumes authority over trainers. 9.01E
1945 A player must have at least four hundred at-bats to qualify as the league leader in Batting Average or Slugging Average 10.23
1947 Six umpires are hired to work in the World Series, all of them on the field.  
1949 On December 21 the "new" rules are issued. There are no major changes, but many ambiguities are eliminated, and they are recodified into the ten sections we have today.  

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JCBA Vol. 20. Rule Changes (1940-1949)
Published: December 15, 2001
Copyright © 2001 by the Cosmic Baseball Association