You’ve got a lot of balls, MLB
by Jesse Spector from Deadspin > Sports News Without Fear, Favor or Compromise on (#5S58R)
As long as you've known baseball, it's been four balls for a walk, but it wasn't always that way. Today is the 133rd anniversary of the Joint Rules Committee taking away 20% of pitchers' margin for error, reducing the number of balls for a walk from five to four.