1991 Cincinnati Reds season

The 1991 Cincinnati Reds season had the team defend their World Series championship, but the team would finish with a losing mark, regressing 17 games from the season before.

Offseason

 * January 29, 1990: Skeeter Barnes was signed as a free agent by the Reds.
 * December 5, 1990: Bill Doran was signed as a free agent with the Cincinnati Reds.

Regular season

 * April 28, 1991: Against the Cubs, relief pitcher Rob Dibble nearly blew a save, allowing two runs on five hits. Clinging to a 4–3 lead in the ninth with the tying run on first, Dibble struck out Ryne Sandberg to finish the game. Despite the win, in frustration he then flung a baseball 400 feet into the center-field seats, inadvertently striking a woman.
 * June 28, 1991: Barry Larkin had six RBIs in a game against the Houston Astros.
 * Barry Larkin had a 19-game hitting streak.
 * At the beginning of July, the Reds peaked at ten games above .500 (44–34). They were in second place in the NL West, only four games behind the Dodgers, and 3.5 games ahead of third place Atlanta.
 * The Reds lost 14 of 16 games (including a 10-game losing streak) during a stretch in July, which saw the Reds essentially drop from contention. They were never above .500 the remainder of the season.

Notable transactions

 * June 14, 1991: Reggie Jefferson was traded by the Cincinnati Reds to the Cleveland Indians for Tim Costo.
 * July 18, 1991: Stan Jefferson was signed as a free agent with the Cincinnati Reds.

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

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
All-Star Game
 * Tom Browning, pitcher
 * Rob Dibble, relief pitcher
 * Barry Larkin, shortstop
 * Lou Piniella, manager