List of Major League Baseball postseason sweeps

Between 1969 and 1984, the League Championship Series (LCS) were held in a best-of-five format. Hence, to accomplish a sweep, a team had to win 3–0. 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. Winners of each half of the season played against each other in a best-of-five format. The best-of-five Division Series were reintroduced in 1995, as part of a postseason and divisional realignment.

To complete a sweep in the Division Series, a sweep requires a 3–0 series win.

After being implemented in the pandemic-shortened 2020 MLB postseason, MLB permanently implemented the Wild Card Series starting 2022, with a best-of-three format. To date, nearly every Wild Card Series held has ended in a sweep, with only 7 of the 24 series going to a Game 3.

• List of World Series champions
  • List of American League pennant winners
  • List of National League pennant winners
• List of Major League Baseball tie-breakers
• List of Major League Baseball game sevens

Lists of reverse sweeps

• List of teams that have overcome 2–0 series deficits in a best-of-five series
• List of teams that have overcome 3–0 series deficits