The St. Louis Cardinals 1998 season was the team's 117th season in St. Louis, Missouri and the 107th season in the National League. The Cardinals went 83–79 during the season and finished third in the National League Central division, 18 games behind the Houston Astros. First baseman Mark McGwire broke Roger Maris' single-season home run record this season by hitting 70 home runs, battling with the Chicago Cubs' Sammy Sosa, who finished runner-up in the National League with 66.

Offseason

Regular season

Opening Day lineup

Season standings

Record vs. opponents

Notable transactions

Scorecard for McGwire's 70th

Entering the game on September 27 against the Montreal Expos, McGwire had 68 home runs. In the third inning, McGwire hit a home run off of Mike Thurman, and in the seventh, he got number 70 off of Carl Pavano. The ball was caught by Philip Ozersky. In January 1999, Todd McFarlane purchased Mark McGwire's 70th home run ball from the 1998 season for a record $3 million. September 27, Busch Stadium, St. Louis, Missouri

Aftermath of the 1998 home run chase

A section of Interstate 70 running through downtown St. Louis was renamed "The Mark McGwire Highway." His record stood until Barry Bonds hit 73 in 2001. In years following, revelations of the anabolic steroids scandals have possibly tainted these records, but at the time it was great theater and was largely responsible for drawing many fans back to the game after the 1994 players' strike, which had angered and alienated many of them.

Roster

Player stats

Batting

Starters by position

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

Other batters

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

Pitching

Starting pitchers

''Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO. = Strikeouts; BB = Bases on balls''

Other pitchers

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

Relief pitchers

Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts; BB = Bases on balls

McGwire's 70

Awards and honors

All-Star Game

Farm system