4 games
Baseball's first modern World Series was in 1903. The American League's Boston Red Sox upset the New York Giants 5 games to 3, in a best of 9 series. The first baseball series called the World Series took place in 1882, with the American Association champion playing the National League champion. But those were considered exhibition games, and are not generally recognized as part of the World Series history.
Two teams play a 7 games series. The first team to win 4 games is the World Champion.
The San Francisco Giants, who defeated the Detroit Tigers in four games in the 2012 World Series.
Jim Palmer is a three-time World Series champion. He had a 4-2 record in World Series games.
4 out of 7
The defending world champion Philadelphia Phillies of the National League and the New York Yankees of the American League. The World Series is now over with the Yankees defeating the Phillies 4 games to 2.
The World Series is about a world championship against the National League champion and the American League champion. The World Series started in 1903 against the Boston Americans versus the Pittsburgh Pirates. Boston won 5 games to 3. As of today, there was 108 World Series played ever since then.
The San Francisco Giants won the 2014 World Series, outlasting the American League champion Kansas City Royals in seven games. It was the Giants' third world championship in five seasons. In the 2010 World Series, they defeated the Texas Rangers four games to one. They swept the Detroit Tigers in four games during the 2012 World Series.
The American League champion New York Yankees swept the National League champion Chicago Cubs 4 games in none in the 1932 World Series. The World Series was the only post season played in 1932, as there were no league divisions and "wild card" teams at that time.
Thurman Munson was an American Major League Baseball catcher who was born in Ohio. He led the Yankees to three back to back World Series games and the team won two of those games. He was rookie of the year, MVP, and a World Series champion.
7 Games
Did any baseball team win two world series games on the same day?