1987 Seattle Mariners season

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 to the Pirates on December 10.
• 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.
• December 17, 1986: Ricky Nelson was traded by the Mariners to the New York Mets for Doug Gwosdz.
• March 31, 1987: Pete Ladd was released by the Mariners.

  Regular season

Season standings

Record vs. opponents

Notable transactions

• May 12, 1987: Mark Huismann was traded by the Mariners to the Cleveland Indians for Dave Gallagher.
• June 2, 1987: 1987 Major League Baseball Draft
• *Ken Griffey, Jr. was drafted by the Seattle Mariners in the 1st round.
• *Pat Listach was drafted by the Mariners in the 23rd round, but did not sign.

  Roster

Player stats

Batting

Starters by position

Other batters

Pitching

Starting pitchers

Other pitchers

Relief pitchers

Awards and honors

• Mark Langston – American League Leader, Strikeouts

Farm system