The following is a complete list of Major League Baseball postseason sweeps since the World Series began in 1903.
Between 1969 and 1984, the League Championship Series (LCS) were held in a best-of-five format.
Since 1985, the LCS has been held in a best-of-seven format, requiring a team to win 4–0.
The Division Series first took place in 1981, due to the 1981 MLB players' strike dividing the season up into two different halves.
The best-of-five Division Series were reintroduced in 1995, as part of a postseason and divisional realignment.