1986 Seattle Mariners season
The Seattle Mariners season was their tenth since the franchise creation. They were seventh in the American League 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, twenty Mariners were struck out by 23-year-old Roger Clemens to set a new major league record. The game was scoreless through six innings, and the Red Sox won 3–1.
Offseason
- November 1, 1985: Bob Long was released by the Mariners.
- December 12, 1985: Darnell Coles was traded by the Mariners to the Detroit Tigers for Rich Monteleone.
- January 18, 1986: Jerry Dybzinski was signed as a free agent with the Mariners.
- January 18, 1986: Steve Fireovid was signed as a free agent by the Mariners.
- January 18, 1986: Pete Ladd was signed as a free agent by the Mariners.
- March 31, 1986: Jerry Dybzinski was released by the Mariners.
Regular season
Notable transactions
- May 21, 1986: Terry Bell was traded to the Kansas City Royals for Mark Huismann.
- August 19, 1986: Spike Owen and Dave Henderson were traded to the Boston Red Sox for Rey Quiñones, Mike Brown, Mike Trujillo, and a player to be named later.
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 |