1966 Chicago Cubs season

The 1966 Chicago Cubs season was the 95th season of the Chicago Cubs franchise, the 91st in the National League and the 51st at Wrigley Field. The Cubs finished tenth and last in the National League with a record of 59–103, 36 games behind the NL Champion Los Angeles Dodgers. The Cubs would not lose 100 or more games in a season for another 46 seasons. One of the defining trades in Cubs history occurred on April 21, when the Cubs acquired future Cy Young Award winner Ferguson Jenkins in a trade with the Philadelphia Phillies.

Offseason

 * December 2, 1965: Lindy McDaniel and Don Landrum were traded by the Cubs to the San Francisco Giants for Randy Hundley and Bill Hands.
 * January 10, 1966: Doug Clemens was traded by the Cubs to the Philadelphia Phillies for Wes Covington.

Notable transactions

 * April 21, 1966: Larry Jackson and Bob Buhl were traded by the Cubs to the Philadelphia Phillies for Ferguson Jenkins, John Herrnstein and Adolfo Phillips.
 * April 28, 1966: Bobby Cox and cash were traded by the Cubs to the Atlanta Braves for Billy Cowan.
 * May 14, 1966: Frank Thomas was signed as a free agent by the Cubs.
 * May 28, 1966: Wes Covington was released by the Cubs.
 * May 29, 1966: John Herrnstein was traded by the Cubs to the Atlanta Braves for Marty Keough and Arnold Earley.
 * June 4, 1966: Frank Thomas was released by the Cubs.
 * June 22, 1966: Billy Cowan was traded by the Cubs to the Philadelphia Phillies for Norm Gigon.

Starters by position
''Note: 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''

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