The 1887 Pittsburgh Alleghenys season was the sixth season of the Pittsburgh Alleghenys franchise and its first in the National League, where they remain to this day.
The Alleghenys finished sixth in the standings with a record of 55–69.
Infielders Note: Pos = Position; 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 Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts
This article relating to a Pittsburgh Pirates baseball season is a stub.