The 1987 New York Yankees season was the 85th season for the Yankees. The team finished in fourth place with a record of 89–73, finishing 9 games behind the Detroit Tigers. New York was managed by Lou Piniella. The Yankees played at Yankee Stadium.

Offseason

Regular season

The Yankees hit 10 grand slams, the most by an MLB team in 1987. Six of those were hit by Don Mattingly, who set a record for most grand slam home runs in one season with six. His record was matched by Travis Hafner during the 2006 season. Mattingly's grand slams in 1987 were also the only six grand slams of his career. In addition, Mattingly had tied Dale Long's major league record by hitting home runs in eight consecutive games (record later tied again by Ken Griffey Jr., of Seattle in 1993), as well as stroking an extra base hit in ten consecutive games. Mattingly had a record 10 home runs during this streak (Long & Griffey had eight of them). In June 1987, it was reported that Mattingly injured his back during some clubhouse horseplay with pitcher Bob Shirley though both denied this. Nevertheless, he finished with a .327 batting average, 30 home runs, and 115 RBIs, his fourth straight year with at least 110 RBIs. On July 13, 1987, George Steinbrenner told manager Lou Piniella that the acquisition of Steve Trout would win the Yankees the pennant. Trout never won a game for the Yankees, going 0–4 in 14 games.

Season standings

Record vs. opponents

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 records

Farm system

LEAGUE CHAMPIONS: Columbus, Fort Lauderdale