1987 Seattle Mariners season

The Seattle Mariners 1987 season was their 11th since the franchise creation, and ended the season finishing fourth in the American League West with a record of 78–84 (.481).

Offseason

December 5, 1986: The Mariners traded a player to be named later to the Pittsburgh Pirates for Rick Rentería. The Mariners completed the deal by sending Bob Siegel (minors) to the Pirates on December 10.^[1]
December 10, 1986: Danny Tartabull and Rick Luecken were traded by the Mariners to the Kansas City Royals for Scott Bankhead, Steve Shields, and Mike Kingery.^[2]
December 17, 1986: Ricky Nelson was traded by the Mariners to the New York Mets for Doug Gwosdz.^[3]
March 31, 1987: Pete Ladd was released by the Mariners.^[4]

May 12, 1987: Mark Huismann was traded by the Mariners to the Cleveland Indians for Dave Gallagher.^[5]
June 2, 1987: 1987 Major League Baseball Draft
- Ken Griffey Jr. was drafted by the Seattle Mariners in the 1st round (1st pick).^[6]
- Pat Listach was drafted by the Mariners in the 23rd round, but did not sign.^[7]

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

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

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

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

Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts

^[8]

^ Rick Renteria page at Baseball Reference
^ Danny Tartabull page at Baseball Reference
^ Doug Gwosdz page at Baseball Reference
^ Pete Ladd page at Baseball Reference
^ Mark Huismann page at Baseball Reference
^ Ken Griffey page at Baseball Reference
^ Pat Listach page at Baseball Reference
^ Johnson, Lloyd, and Wolff, Miles, ed., The Encyclopedia of Minor League Baseball, 2nd and 3rd editions. Durham, North Carolina: Baseball America, 1997 and 2007