The Seattle Mariners season was their tenth since the franchise creation. They were seventh in the American League (AL) West with a record of , the worst record in the league and second-worst in the majors.

At Boston's Fenway Park on Tuesday, April 29, 23-year-old Roger Clemens struck out 20 Mariners, a new major league record. The game was scoreless through six innings, and the Red Sox won 3–1.

Manager Chuck Cottier was fired in May. Marty Martínez managed one game as interim manager before Dick Williams became the manager.

Jim Presley represented the Mariners in the All-Star Game. Mark Langston led the AL with 245 strikeouts, and John Moses tied for the league lead with 18 times caught stealing.

Offseason November 1, 1985: Bob Long was released by the Mariners. December 12: Darnell Coles was traded by the Mariners to the Detroit Tigers for Rich Monteleone. January 18, 1986: Jerry Dybzinski, Steve Fireovid, and Pete Ladd signed as free agents with the Mariners. March 31: Dybzinski was released by the Mariners.

Regular season

Season standings

Record vs. opponents

Notable transactions May 21, 1986: Terry Bell was traded by Seattle to the Kansas City Royals for Mark Huismann. June 26: Received catcher Scott Bradley from the Chicago White Sox. Five days later, the Mariners sent outfielder Iván Calderón to the White Sox. August 19: Spike Owen and Dave Henderson were traded by the Mariners to the Boston Red Sox for Rey Quiñones, Mike Brown, Mike Trujillo, and a player to be named later. John Christensen was sent to Seattle on September 25 to complete the trade.

Roster 1986 Seattle Mariners Roster Pitchers Catchers

Infielders Outfielders Manager

Coaches

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 Pos Player G AB H Avg. HR RBI C Bob Kearney 81 204 49 .240 6 25 1B Alvin Davis 135 479 130 .271 18 72 2B Harold Reynolds 126 445 99 .222 1 24 SS Spike Owen 112 402 99 .246 0 35 3B Jim Presley 155 616 163 .265 27 107 LF Phil Bradley 143 526 163 .310 12 50 CF John Moses 103 399 102 .256 3 34 RF Danny Tartabull 137 511 138 .270 25 96 DH Ken Phelps 125 344 85 .247 24 64

Other batters Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; RBI = Runs batted in Player G AB H Avg. HR RBI Ken Phelps 125 344 85 .247 24 64 Dave Henderson 103 337 93 .276 14 44 Scott Bradley 68 199 60 .302 5 28 Iván Calderón 37 131 31 .237 2 13 Steve Yeager 50 130 27 .208 2 12 Rey Quiñones 36 122 23 .189 0 7 Mickey Brantley 27 102 20 .196 3 7 Domingo Ramos 49 99 18 .182 0 5 Al Cowens 28 82 15 .183 0 6 Dave Hengel 21 63 12 .190 1 6 Dave Valle 22 53 18 .340 5 15 Barry Bonnell 17 51 10 .196 0 4 Ross Jones 11 21 2 .095 0 0 Ricky Nelson 10 12 2 .167 0 1

Pitching

Starting pitchers Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts Player G IP W L ERA SO Mike Moore 38 266.0 11 13 4.36 146 Mark Langston 37 239.1 12 14 4.85 245 Mike Morgan 37 216.1 11 17 4.53 116

Other pitchers Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts Player G IP W L ERA SO Bill Swift 29 115.1 2 9 5.46 55 Milt Wilcox 13 55.2 0 8 5.50 26 Mike Trujillo 11 41.1 3 2 2.40 19 Jim Beattie 9 40.1 0 6 6.02 24 Jerry Reed 11 34.2 4 0 3.12 16 Steve Fireovid 10 21.0 2 0 4.29 10 Mike Brown 6 15.2 0 2 7.47 9

Relief pitchers Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts Player G W L SV ERA SO Matt Young 65 8 6 13 3.82 82 Pete Ladd 52 8 6 6 3.82 53 Lee Guetterman 41 0 4 0 7.34 38 Mark Huismann 36 3 3 4 3.71 59 Karl Best 26 2 3 1 4.04 23 Edwin Núñez 14 1 2 0 5.82 17 Paul Mirabella 8 0 0 0 8.53 6

Farm system

League champions: BellinghamJohnson, Lloyd, and Wolff, Miles, ed., The Encyclopedia of Minor League Baseball, 2nd and 3rd editions. Durham, North Carolina: Baseball America, 1997 and 2007

References

External links 1986 Seattle Mariners at Baseball Reference 1986 Seattle Mariners team page at www.baseball-almanac.com