The American League came to be in 1900. It was formed by joining together several minor league teams (and not by splitting off from the National League). In 1900, Ban Johnson (president of the...
I assume you're asking about the differences. The most basic answer is that in the American League the pitcher does not bat, and a designated hitter (DH) is used in the pitchers place. Pitchers bat...
Major League Baseball started what they call "Interleague Play" back in 1997 in order to draw a little more interest for games. For instance, now the New York Yankees and New York Mets can play every...