When the Los Angeles Dodgers and the Oakland Athletics played in the 1988 World Series, the Dodgers had home field advantage. At that time, Major League Baseball rules provided that the home field advantage alternated between the American League and the National League. That practice continued until 2003, when MLB decided that the winner of the annual All Star game would be awarded home field advantage in the World Series.
There is an MLB rule that states the League that wins the All-Star game has home field advantage in the World Series. Since the American League won the 2009 All-Star game, 4-3, they get home field advantage for the 2009 World Series.
The location of the World Series is determined according to the two teams that they are playing and whichever league won the All Star Game in July is the league that will be given the home field advantage for the World Series and the World Series is set up so that Games 1, 2, 6 and 7 will be at the team with the home field advantage's stadium and Games 3, 4 and 5 will be at the stadium of the team that doesn't have the home field advantage.
The San Francisco Giants, because National League won the All-Star game and that determines Home Field Advantage for the World Series.
Currently, whatever league wins the All-Star game will have Home-Field advantage in the World Series.
As far as the major league divisional and league championship series are concerned, home field is determined by the won-loss record a team has for the regular season. However, a wildcard team is always seeded forth regardless of it's record. For the World Series, home field advantage is determined by which league won the All Star Game. If the National League won the All Star Game the National League team will have home field advantage in the World Series. If the American Leaegue won the All Star Game the American League team will have home field advantage in the World Series.
The winner of the All-Star Game determines home field advantage for the World Series. For example, if the National League wins the first two games of the World Series will be played in the National League ballpark before playing the next three in the American League ballpark.
Major League Baseball instituted a new policy this year, giving the home-field advantage in the World Series to the team from the league that won that year's All-Star Game. The American League won the 2004 All-Star Game, so the AL's World Series representative--Boston--gets the home-field advantage.
Yes ... that began in 2003.
The winner of the All Star game, whichever league wins that gets home field advantage in the series
MLB decided to award home-field advantage in the World Series to the winner of the All-Star Game. Originally implemented as a two-year trial from 2003 to 2004, the practice has been extended indefinitely. The American League won every All-Star Game since this change until 2010 and thus has enjoyed home-field advantage from 2002, when it also had home-field advantage based on the alternating schedule, through 2009.
The two leagues alternated home-field advantage. In even years (1990, 1992) it was the NL; in odd years, AL.
Statistically speaking, yes. Since 1985, the team that has opened the World Series at home (hosting a possible four of seven games) has been victorious in 24 of the last 30 World Series.