1871 Rockford Forest Citys season

The Rockford Forest Citys played their first and only season in 1871 as a charter member of the National Association of Professional Base Ball Players. They finished ninth in the league with a record of 4–21. They folded after the season.

Regular season
Rockford finished with 4 wins and 21 losses, 15½ games behind the champion Philadelphia Athletics club and good for last place. Player-manager Scott Hastings was found to have violated the "60 day rule" implemented by the league—if a player switched teams during the season, the team had to bench him for 60 days before he could play. Hastings had jumped from a Louisiana team to the Forest Citys in the spring and immediately begun playing for Rockford. This complaint was brought before the league, and the Forest Citys were forced to forfeit 4 of their wins.

The star of the team was Cap Anson, who hit .325 for the Forest Citys and would go on to become the player-manager of the Chicago White Stockings for over 20 seasons. Anson was inducted into the Hall of Fame in 1939.

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''

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

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