The Seattle Mariners season was their eighth since the franchise creation. They finished fifth in the American League West with a record of .
Offseason November 21, 1983: Bill Caudill and Darrel Akerfelds were traded to the Oakland Athletics for Dave Beard and Bob Kearney.Bill Caudill page at Baseball Reference December 5, 1983: Dave Geisel was selected by the Mariners from the Toronto Blue Jays in the rule 5 draft.Dave Geisel page at Baseball Reference January 17, 1984: Mike Blowers was selected in the eighth round of the amateur draft, but did not sign.Mike Blowers page at Baseball Reference March 23, 1984: Rick Sweet was released by the Mariners.Rick Sweet page at Baseball Reference
Regular season September 1 – Manager Del Crandall () was fired on Saturday morning, September 1, succeeded by third base coach Chuck Cottier. First baseman Alvin Davis reached base in each of the first 47 games of his career, and was chosen for his only All-Star Game. The M's MVP, he was also voted the American League's Rookie of the Year, with a .284 batting average, 27 home runs, and 116 RBIs. Lefthanded starting pitcher Mark Langston became the first rookie since Herb Score to lead the American League in strikeouts; he was second in the balloting to teammate Davis for AL Rookie of the Year
Season standings
Record vs. opponents
Notable transactions
Roster 1984 Seattle Mariners Roster Pitchers Catchers
Infielders Outfielders
Other batters Manager
Coaches (Third Base) (Pitching) (Hitting) (First Base)
Game log Regular season
|-style=background:#fbb | 36 || May 14 || || @ Tigers || 5–7 || Lopez || Vande Berg || – || 3:05 || 18,830 || 18–18 || L2 |-style=background:#fbb | 37 || May 15 || || @ Tigers || 4–6 || Morris || Thomas || Hernandez || 3:32 || 21,782 || 18–19 || L3 |-style=background:#fbb | 38 || May 16 || || @ Tigers || 1–10 || Wilcox || Young || – || 2:52 || 22,001 || 18–20 || L4 |-style=background:#cfc | 45 || May 25 || || Tigers || 7–3 || Vande Berg || Wilcox || Mirabella || 2:54 || 15,722 || 21–24 || W1 |-style=background:#cfc | 46 || May 26 || || Tigers || 9–5 || Moore || Berenguer || – || 2:51 || 41,342 || 22–24 || W2 |-style=background:#cfc | 47 || May 27 || || Tigers || 6–1 || Young || Petry || – || 2:50 || 12,755 || 23–24 || W3
|-style=background:#bbbfff |colspan="12"|55th All-Star Game in San Francisco, CA
|-style=background:#fbb | 123 || August 17 || || @ Tigers || 2–6 || Wilcox || Moore || – || 3:08 || 36,496 || 55–68 || L1 |-style=background:#fbb | 124 || August 18 || || @ Tigers || 3–4 || Berenguer || Geisel || Hernandez || 2:41 || 36,719 || 55–69 || L2 |-style=background:#cfc | 125 || August 19 || || @ Tigers || 4–1 || Langston || Petry || Vande Berg || 2:51 || 43,277 || 56–69 || W1 |-style=background:#fbb | 132 || August 28 || || Tigers || 4–5 || Hernandez || Stanton || – || 2:51 || 8,353 || 57–75 || L5 |-style=background:#cfc | 133 || August 29 || || Tigers || 5–1 || Langston || Petry || – || 2:11 || 10,863 || 58–75 || W1 |-style=background:#cfc | 134 || August 30 || || Tigers || 2–1 || Beattie || Morris || Nunez || 2:34 || 9,583 || 59–75 || W2
|- style="text-align:center;" | Legend: = Win = Loss = PostponementBold = Mariners team member
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 133 431 97 .225 7 43 1B Alvin Davis 152 567 161 .284 27 116 2B Jack Perconte 155 612 180 .294 0 31 SS Spike Owen 152 530 130 .245 3 43 3B Jim Presley 70 251 57 .227 10 36 LF Barry Bonnell 110 363 96 .264 8 48 CF Dave Henderson 112 350 98 .280 14 43 RF Al Cowens 139 524 145 .277 15 78 DH Ken Phelps 101 290 70 .241 24 51
Other batters Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in Player G AB H Avg. HR RBI Steve Henderson 109 325 85 .262 10 35 Phil Bradley 124 322 97 .301 0 24 Larry Milbourne 79 211 56 .265 1 22 Pat Putnam 64 155 31 .200 2 16 Darnell Coles 48 143 23 .161 0 6 Gorman Thomas 35 108 17 .157 1 13 Domingo Ramos 59 81 15 .185 0 2 Orlando Mercado 30 78 17 .218 0 5 Al Chambers 22 49 11 .224 1 4 John Moses 19 35 12 .343 0 2 Dave Valle 13 27 8 .296 1 4 Bill Nahorodny 12 25 6 .240 1 3 Iván Calderón 11 24 5 .208 1 1 Danny Tartabull 10 20 6 .300 2 7 9 15 3 .200 1 2 Harold Reynolds 10 10 3 .300 0 0
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 35 225.0 17 10 3.40 204 Mike Moore 34 212.0 7 17 4.97 158 32 211.0 12 16 3.41 119 Matt Young 22 113.1 6 8 5.72 73 19 95.1 6 5 3.97 37
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 Ed Vande Berg 50 130.1 8 12 4.76 71 27 79.0 2 3 5.13 39 20 43.1 1 1 4.15 28
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 54 4 4 8 3.54 55 Paul Mirabella 52 2 5 3 4.37 41 43 3 2 5 5.80 40 Edwin Núñez 37 2 2 7 3.19 57 21 3 2 1 5.26 42 5 1 1 0 3.00 6 Lee Guetterman 3 0 0 0 4.15 2
Awards and honors Mark Langston – American League Leader, Strikeouts (204)
All-Star Game
Farm system
Johnson, 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 1984 Seattle Mariners at Baseball Reference 1984 Seattle Mariners team page at www.baseball-almanac.com