The 2005 Seattle Mariners season was the 29th season in franchise history, and their second consecutive season finishing at the bottom of the American League West, finishing with a record of 69–93 (.426). They only had one player represented at the 2005 All-Star Game, who was Ichiro Suzuki with his fifth selection for the All-Star Game.

Over the course of the disappointing season, the Mariners managed to have their longest winning streak over the course of a four-game series with the Angels (July 7–10), while having two losing streaks of seven between April 30–8 May / June 25 – July 2.

Offseason December 17, 2004: Adrián Beltré was signed as a free agent with the Seattle Mariners.

Regular season

Opening Day starters Adrián Beltré Bret Boone Raúl Ibañez Jamie Moyer Miguel Olivo Jeremy Reed Richie Sexson Ichiro Suzuki Wilson Valdez Randy Winn

Season standings

Record vs. opponents

Transactions June 7, 2005: Jeff Clement was drafted by the Seattle Mariners in the 1st round (3rd pick) of the 2005 amateur draft. Player signed July 26, 2005. July 11, 2005: Bret Boone was sent to the Minnesota Twins by the Seattle Mariners as part of a conditional deal. July 30, 2005: Yorvit Torrealba was traded by the San Francisco Giants with Jesse Foppert to the Seattle Mariners for Randy Winn. August 19, 2005: Scott Spiezio was released by the Seattle Mariners.

Roster 2005 Seattle Mariners Roster Pitchers Catchers

Infielders Outfielders Manager

Coaches (hitting) (first base) (bench) (third base) (pitching) (bullpen)

Game log

|- style="text-align:center;background-color:#bbffbb" | 1 || April 4 || Twins || 5–1 || Moyer (1–0) || Radke (0–1) || || 46,249 || 1–0 |- style="text-align:center;background-color:#ffbbbb" | 2 || April 5 || Twins || 8–4 || Santana (1–0) || Thornton (0–1) || || 28,373 || 1–1 |- style="text-align:center;background-color:#ffbbbb" | 3 || April 6 || Twins || 4–1 || Silva (1–0) || Madritsch (0–1) || Nathan (1) || 25,580 || 1–2 |- style="text-align:center;background-color:#bbffbb" | 4 || April 8 || Rangers || 9–6 || Putz (1–0) || Regilio (0–1) || Guardado (1) || 29,652 || 2–2 |- style="text-align:center;background-color:#ffbbbb" | 5 || April 9 || Rangers || 7–6 || Brocail (1–0) || Guardado (0–1) || Cordero (1) || 31,501 || 2–3 |- style="text-align:center;background-color:#ffbbbb" | 6 || April 10 || Rangers || 7–6 || Riley (1–0) || Thornton (0–2) || Cordero (2) || 30,434 || 2–4 |- style="text-align:center;background-color:#bbffbb" | 7 || April 11 || @ Royals || 8–2 || Franklin (1–0) || Hernández (1–1) || || 41,788 || 3–4 |- style="text-align:center;background-color:#bbffbb" | 8 || April 13 || @ Royals || 2–1 || Sele (1–0) || Cerda (0–1) || Guardado (2) || 10,577 || 4–4 |- style="text-align:center;background-color:#bbffbb" | 9 || April 14 || @ Royals || 10–2 || Moyer (2–0) || Bautista (1–1) || || 10,212 || 5–4 |- style="text-align:center;background-color:#ffbbbb" | 10 || April 15 || @ White Sox || 6–4 || Garland (2–0) || Piñeiro (0–1) || Hermanson (2) || 16,749 || 5–5 |- style="text-align:center;background-color:#ffbbbb" | 11 || April 16 || @ White Sox || 2–1 || Buehrle (2–1) || Franklin (1–1) || || 25,931 || 5–6 |- style="text-align:center;background-color:#bbffbb" | 12 || April 17 || @ White Sox || 5–4 || Meche (1–0) || García (1–1) || Guardado (3) || 23,324 || 6–6 |- style="text-align:center;background-color:#ffbbbb" | 13 || April 18 || @ Angels || 6–1 || Byrd (1–2) || Sele (1–1) || || 39,638 || 6–7 |- style="text-align:center;background-color:#bbffbb" | 14 || April 19 || @ Angels || 5–3 || Moyer (3–0) || Gregg (1–1) || Guardado (4) || 38,667 || 7–7 |- style="text-align:center;background-color:#bbffbb" | 15 || April 20 || Athletics || 7–6 || Piñeiro (1–1) || Street (1–1) || Guardado (5) || 24,841 || 8–7 |- style="text-align:center;background-color:#ffbbbb" | 16 || April 21 || Athletics || 3–0 || Harden (2–0) || Franklin (1–2) || Dotel (3) || 22,428 || 8–8 |- style="text-align:center;background-color:#ffbbbb" | 17 || April 22 || Indians || 6–1 || Sabathia (1–0) || Meche (1–1) || || 43,207 || 8–9 |- style="text-align:center;background-color:#ffbbbb" | 18 || April 23 || Indians || 5–2 || Lee (2–0) || Sele (1–2) || Wickman (5) || 33,564 || 8–10 |- style="text-align:center;background-color:#bbffbb" | 19 || April 24 || Indians || 9–1 || Moyer (4–0) || Elarton (0–1) || || 32,889 || 9–10 |- style="text-align:center;background-color:#bbffbb" | 20 || April 26 || @ Rangers || 7–4 || Piñeiro (2–1) || Drese (2–2) || Guardado (6) || 23,064 || 10–10 |- style="text-align:center;background-color:#ffbbbb" | 21 || April 27 || @ Rangers || 8–2 || Rogers (1–2) || Franklin (1–3) || || 26,308 || 10–11 |- style="text-align:center;background-color:#bbffbb" | 22 || April 28 || @ Rangers || 4–1 || Meche (2–1) || Young (2–2) || Guardado (7) || 23,928 || 11–11 |- style="text-align:center;background-color:#bbffbb" | 23 || April 29 || @ Athletics || 4–2 || Sele (2–2) || Haren (1–3) || Guardado (8) || 18,545 || 12–11 |- style="text-align:center;background-color:#ffbbbb" | 24 || April 30 || @ Athletics || 6–5 || Yabu (2–0) || Villone (0–1) || || 23,288 || 12–12

|- style="text-align:center;background-color:#ffbbbb" | 25 || May 1 ||@ Athletics || 3–2 || Zito (1–4) || Piñeiro (2–2) || Dotel (6) || 30,634 || 12–13 |- style="text-align:center;background-color:#ffbbbb" | 26 || May 2 || Anaheim || 5–0 || Washburn (2–0) || Franklin (1–4) || || 24,184 || 12–14 |- style="text-align:center;background-color:#ffbbbb" | 27 || May 3 || Anaheim || 5–2 || Lackey (3–1) || Meche (2–2) || Shields (2) || 29,917 || 12–15 |- style="text-align:center;background-color:#ffbbbb" | 28 || May 4 || Anaheim || 5–2 || Byrd (2–3) || Sele (2–3) || Rodríguez (7) || 26,303 || 12–16 |- style="text-align:center;background-color:#ffbbbb" | 29 || May 6 || @ Red Sox || 7–2 || Clement (4–0) || Moyer (4–1) || || 35,229 || 12–17 |- style="text-align:center;background-color:#bbbbbb" | – || May 7 || @ Red Sox || colspan=5|Postponed, rescheduled for 8 May || 12–17 |- style="text-align:center;background-color:#ffbbbb" | 30 || May 8 || @ Red Sox || 6–3 || González (1–0) || Piñeiro (2–3) || Foulke (8) || 34,848 || 12–18 |- style="text-align:center;background-color:#bbffbb" | 31 || May 8 || @ Red Sox || 6–4 || Franklin (2–4) || Halama (1–1) || Guardado (9) || 34,671 || 13–18 |- style="text-align:center;background-color:#ffbbbb" | 32 || May 9 || @ Yankees || 4–3 || Johnson (3–2) || Nelson (0–1) || Rivera (4) || 38,079 || 13–19 |- style="text-align:center;background-color:#ffbbbb" | 33 || May 10 || @ Yankees || 7–4 || Wang (1–1) || Sele (2–4) || Rivera (5) || 39,780 || 13–20 |- style="text-align:center;background-color:#ffbbbb" | 34 || May 11 || @ Yankees || 13–9 || Quantrill (1–0) || Thornton (0–3) || || 47,844 || 13–21 |- style="text-align:center;background-color:#bbffbb" | 35 || May 13 || Red Sox || 14–7 || Mateo (1–0) || González (1–1) || || 44,534 || 14–21 |- style="text-align:center;background-color:#ffbbbb" | 36 || May 14 || Red Sox || 6–3 || Myers (1–0) || Villone (0–2) || Foulke (9) || 46,229 || 14–22 |- style="text-align:center;background-color:#bbffbb" | 37 || May 15 || Red Sox || 5–4 || Meche (3–2) || Wakefield (4–2) || Guardado (10) || 46,145 || 15–22 |- style="text-align:center;background-color:#ffbbbb" | 38 || May 16 || Yankees || 6–3 || Wang (2–1) || Hasegawa (0–1) || Rivera (7) || 37,814 || 15–23 |- style="text-align:center;background-color:#ffbbbb" | 39 || May 17 || Yankees || 6–0 || Pavano (3–2) || Mateo (1–1) || || 35,549 || 15–24 |- style="text-align:center;background-color:#bbffbb" | 40 || May 18 || Yankees || 7–6 || Nelson (1–1) || Gordon (0–3) || Villone (1) || 37,419 || 16–24 |- style="text-align:center;background-color:#ffbbbb" | 41 || May 20 || Padres || 6–1 || Peavy (4–0) || Franklin (2–5) || || 38,400 || 16–25 |- style="text-align:center;background-color:#bbffbb" | 42 || May 21 || Padres || 5–3 || Meche (4–2) || Lawrence (2–5) || Guardado (11) || 37,286 || 17–25 |- style="text-align:center;background-color:#bbffbb" | 43 || May 22 || Padres || 5–0 || Sele (3–4) || Stauffer (1–1) || || 41,017 || 18–25 |- style="text-align:center;background-color:#ffbbbb" | 44 || May 24 || @ Orioles || 3–2 || Williams (4–3) || Putz (1–1) || Ryan (13) || 19,839 || 18–26 |- style="text-align:center;background-color:#ffbbbb" | 45 || May 25 || @ Orioles || 3–1 || López (3–2) || Moyer (4–2) || Ryan (14) || 18,820 || 18–27 |- style="text-align:center;background-color:#ffbbbb" | 46 || May 26 || @ Orioles || 5–2 || Cabrera (4–3) || Franklin (2–6) || || 22,166 || 18–28 |- style="text-align:center;background-color:#ffbbbb" | 47 || May 27 || @ Devil Rays || 5–4 || Hendrickson (2–2) || Meche (4–3) || Báez (7) || 10,130 || 18–29 |- style="text-align:center;background-color:#bbffbb" | 48 || May 28 || @ Devil Rays || 3–2 || Sele (4–4) || Fossum (2–3) || Guardado (12) || 13,281 || 19–29 |- style="text-align:center;background-color:#bbffbb" | 49 || May 29 || @ Devil Rays || 10–9 || Villone (1–2) || McClung (0–2) || Guardado (13) || 13,851 || 20–29 |- style="text-align:center;background-color:#bbffbb" | 50 || May 30 || Blue Jays || 4–3 || Moyer (5–2) || Lilly (3–5) || Guardado (14) || 25,540 || 21–29 |- style="text-align:center;background-color:#ffbbbb" | 51 || May 31 || Blue Jays || 9–7 || Gaudin (1–0) || Franklin (2–7) || Batista (9) || 25,737 || 21–30

|- style="text-align:center;background-color:#bbffbb" | 52 || June 1 || Blue Jays || 3–0 || Meche (5–3) || Chacín (5–4) || Guardado (15) || 24,815 || 22–30 |- style="text-align:center;background-color:#ffbbbb" | 53 || June 3 || Devil Rays || 6–1 || Waechter (2–3) || Sele (4–5) || || 35,344 || 22–31 |- style="text-align:center;background-color:#bbffbb" | 54 || June 4 || Devil Rays || 6–5 || Mateo (2–1) || Báez (4–1) || Guardado (16) || 32,742 || 23–31 |- style="text-align:center;background-color:#bbffbb" | 55 || June 5 || Devil Rays || 6–5 || Villone (2–2) || Orvella (0–1) || || 40,004 || 24–31 |- style="text-align:center;background-color:#bbffbb" | 56 || June 7 || @ Marlins || 4–3 || Hasegawa (1–1) || Mecir (1–1) || Guardado (17) || 20,519 || 25–31 |- style="text-align:center;background-color:#ffbbbb" | 57 || June 8 || @ Marlins || 5–4 || Willis (10–2) || Meche (5–4) || Jones (10) || 19,313 || 25–31 |- style="text-align:center;background-color:#bbffbb" | 58 || June 9 || @ Marlins || 8–0 || Sele (5–5) || Beckett (7–4) || || 16,069 || 26–32 |- style="text-align:center;background-color:#ffbbbb" | 59 || June 10 || @ Nationals || 9–3 || Ayala (6–3) || Hasegawa (1–2) || || 28,704 || 26–33 |- style="text-align:center;background-color:#ffbbbb" | 60 || June 11 || @ Nationals || 2–1 || Patterson (3–1) || Putz (1–2) || Cordero (18) || 39,108 || 26–34 |- style="text-align:center;background-color:#ffbbbb" | 61 || June 12 || @ Nationals || 3–2 || Armas (3–3) || Franklin (2–8) || Cordero (19) || 37,170 || 26–35 |- style="text-align:center;background-color:#bbffbb" | 62 || June 14 || Phillies || 3–1 || Meche (6–4) || Lieber (8–5) || Guardado (18) || 26,818 || 27–35 |- style="text-align:center;background-color:#bbffbb" | 63 || June 15 || Phillies || 5–1 || Sele (6–5) || Padilla (3–6) || || 26,019 || 28–35 |- style="text-align:center;background-color:#ffbbbb" | 64 || June 16 || Phillies || 3–2 || Geary (1–0) || Mateo (2–2) || Wagner (18) || 27,162 || 28–36 |- style="text-align:center;background-color:#bbffbb" | 65 || June 17 || Mets || 5–0 || Moyer (6–2) || Ishii (1–6) || Nelson (1) || 37,443 || 29–36 |- style="text-align:center;background-color:#bbffbb" | 66 || June 18 || Mets || 4–1 || Franklin (3–8) || Martínez (7–2) || Guardado (19) || 45,841 || 30–36 |- style="text-align:center;background-color:#bbffbb" | 67 || June 19 || Mets || 11–5 || Meche (7–4) || Glavine (4–7) || || 45,785 || 31–36 |- style="text-align:center;background-color:#ffbbbb" | 68 || June 20 || Athletics || 6–2 || Haren (5–7) || Villone (2–3) || || 27,263 || 31–37 |- style="text-align:center;background-color:#ffbbbb"