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Called Strike Rule Change
Called Strike Rule Change(I could only find year for the date) Before this rule came into effect, batters could sit back and wait for thei perfect pitch before attempting to swing at the ball. -
"One Bounce" Rule
One Bounce(I could only find year for the date) Up until 1864 defense could get a player out by catching the ball after one bounce. This was because the glove hadn't been invented yet. -
National League Born
Wikipedia article on the Natioinal LeagueBeing the world's oldest current league in baseball, the National League is sometimes called the Senior Circuit because it is 25 years older than the American League. -
Under Hand Pitching
Underhand Pitching Rule change (could only find year for date) Before the change from under to over hand pitching, underhand was a batters paradise. The pitchers objective was to just throw the ball so it could go into play. The real action happened between the batter and the defense. -
American League Born
Wikipedia article on Aational leagueCreated 25 years after the National League, the AMerican League was formed from a smaller league formerly called the Western League. -
End of Dead Ball Era
Ban on Doctored Pitches(I could only find month and year for the date) February 1920 marked the end of "doctored" pitches. In summary, those are pitches like spitballs, scuffed balls, sanded balls, and any other trick pitch. -
Night Games
Night Games by GE Lighting May 24, 1935 the first night baseball game was played. With over 20,000 fans attending that was 10 times more than people going to day games. This allowed people working during the day hours to watch at night and not be tempted to take the day off. -
Jackie Robinson into MLB
Jackie Robinson into MLBJackie Robinson was the first African American to break the color line and join the Major Leagues. -
162 Game Season Starting 1961
162 game season (could only find year for the date) The baseball season was expanded from 154 games per season to 162 games when the American League added two teams. A year later, National League played 162 games also when they expanded to 10 teams. -
Designated Hitter
DH(COuld only find year) The designated hitter was put into effect in 1973. The reason was so the pitcher, who are only trained to pitch balls at 90 mph, could be taken out of the line up and replaced by someone whose only job was job hit.