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.

Infielders Coaches 1990 Major League Baseball All-Star Game Note: G = Games played; AB = At bats; H = Hits; Avg.

Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

LEAGUE CHAMPIONS: DSL Pirates