On April 21, 1957, Don Hoak of the Cincinnati Red Legs unwittingly brings about a change in the rules. Leading off second base, Hoak intentionally interferes with an apparent double play grounder. Hoak is called out, but the batter is safe. A new rule will result: if a runner willfully interferes with a batted ball, both the runner and the batter will be called out.
April 16, 1929
April 7, 1969