In the World Series, a sweep refers to a Major League Baseball (MLB) team winning four straight games and losing none in a best-of-seven format.
There have been 19 sweeps in World Series history. The American League has been responsible for thirteen of the sweeps, with the New York Yankees account for more than half of those, with a record eight. The National League is responsible for the remaining six sweeps, with the New York / San Francisco Giants and the Cincinnati Reds each achieving two.[1]
The first sweep is credited to the 1914 "Miracle" Boston Braves who defeated the 1914 Philadelphia Athletics in four straight games. The most recent sweep occurred in the 2012 World Series, when the San Francisco Giants defeated the Detroit Tigers.[2]