| Tournament details | |
|---|---|
| Dates | October 2–14, 1984[1] |
| Teams | 4 |
| Final positions | |
| Champions | Detroit Tigers (4th title) |
| Runner-up | San Diego Padres (1st World Series appearance) |
| Tournament statistics | |
| MVP | Alan Trammell (DET) |
The 1984 Major League Baseball postseason was the playoff tournament of Major League Baseball for the 1984 season. The winners of each division advance to the postseason and face each other in a League Championship Series to determine the pennant winners that face each other in the World Series.
In the American League, the Detroit Tigers returned to the postseason for the first time since 1972, and the Kansas City Royals returned to the postseason for the sixth time in nine years. In the National League, the Chicago Cubs were making their first postseason appearance since the 1945 World Series, and the San Diego Padres made their first postseason appearance in franchise history.
The playoffs began on October 2, 1984, and concluded on October 14, 1984, with the Tigers defeating the Padres in five games in the 1984 World Series. This was the first title since 1968 for the Tigers and their fourth overall.