The 1990 Pittsburgh Pirates season was their 109th season; the 104th in the National League. This was their 21st season at Three Rivers Stadium. The Pirates finished first in the National League East with a record of 95–67. They were defeated four games to two by the Cincinnati Reds in the NLCS.

Offseason

Regular season

Season standings

Game log

Record vs. opponents

Detailed records

Roster

Opening Day lineup

National League Championship Series

Awards and honors

1990 Major League Baseball All-Star Game

Player stats

''Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in'' Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Notable transactions

Farm system

LEAGUE CHAMPIONS: DSL Pirates