Starting in 2013 there will be 15 teams in each league (currently there are 16 in the National League and 14 in the American League but Houston will be moving to the AL starting next year). Because there are an odd number of teams, there will always be one team from each league that will have to play outside their league.
Yes, American League teams play against National League teams in interleague games during the regular season.
Yes, American League and National League teams play against each other in interleague games during the regular season.
Yes. Each season teams will play 15 to 18 games against teams from the other league.
Yes, the American League and the National League teams play against each other in Major League Baseball during interleague play and the World Series.
30 major League Teams 14 in the American League 16 in the National League
In 2010 there are 14 American League teams, and 16 National League teams.
American League teams play the National League teams for four series per season, in what is called "interleague play." also, in the World Series, an American League team plays a National League team.
No, the national league pitchers have to bat and all national league teams play by taht rule and all American league teams have a DH
There are 16 teams in the National League.
There are 14 teams in the American League. There are also 16 in the National League.
There are 15 teams in the American League and 15 teams in the National League for a total of 30.
There were 30 teams in the MLB, 14 in the American League and 16 in the National League.