The 1959 Major League Baseball season saw the Pittsburgh Pirates finish in fourth place in the National League at 78–76, nine games behind the NL and World Series Champion Los Angeles Dodgers. The Pirates set the record for most extra innings victories in a season, winning 19 of their 21 extra inning games.

Offseason

Regular season

Season standings

Record vs. opponents

Game log

Opening Day lineup

Notable transactions

Roster

Player stats

Batting

Starters by position

''Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Other batters

''Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Pitching

Starting pitchers

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

Other pitchers

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

Relief pitchers

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

Awards and honors

Records

Farm system

LEAGUE CHAMPIONS: Salt Lake City, Gastonia, Wilson Columbus (GA) franchise transferred to Gastonia, May 26, 1959; San Angelo franchise transferred to Roswell, June 9, 1959