The 2024 Seattle Mariners season was the 48th season in franchise history. The Mariners played their 25th full season (26th overall) at T-Mobile Park, their home ballpark in Seattle, Washington. The season opened on March 28 at home against the Boston Red Sox and ended on September 29 at home against the Oakland Athletics.
On June 19, the Mariners held a ten game lead in the American League (AL) West. However, their weak offense (which finished with a batting average of .224) began to take its toll. By July 24, they blew their division lead and began to fall out of playoff position entirely. On August 22, the Mariners dismissed manager Scott Servais following struggles by the team. The team named former catcher Dan Wilson as their new manager. Despite going 16–10 in September, the Mariners were eliminated from playoff contention for the second consecutive season, following wins by the Kansas City Royals and Detroit Tigers on September 26 and 27, respectively.
Pitchers Logan Gilbert and Andrés Muñoz represented Seattle in the MLB All-Star Game. Muñoz replaced Gilbert, who was unable to pitch due to a scheduled start days before the game.
Offseason The Mariners finished the 2023 season in third place in the AL West. The team's efforts to improve the team were financially hampered by a decision by Comcast to remove the team's regional sports network, Root Sports Northwest, from many customers' cable television plans. In a salary-saving move, starting pitcher Robbie Ray was traded to the San Francisco Giants for former Seattle outfielder Mitch Haniger. Finances also contributed to the trade of former top prospect Jarred Kelenic as well as Marco Gonzales and Evan White, both of whom had long-term contracts and injury issues, to the Atlanta Braves for pitchers Jackson Kowar and Cole Phillips. The team also traded Eugenio Suárez to the Arizona Diamondbacks and did not extend a qualifying offer to Teoscar Hernández.
The Mariners most significant free agent signing was designated hitter/catcher Mitch Garver, who agreed to a two-year, $24 million contract. Through trades, the team acquired starters Jorge Polanco and Luis Urías as well as relief pitchers Gregory Santos and Carlos Vargas.
Transactions November 17, 2023 – Acquired infielder Luis Urías from the Boston Red Sox in exchange for right-handed relief pitcher Isaiah Campbell. November 22 – Acquired RHP Carlos Vargas and C Seby Zavala from the Arizona Diamondbacks in exchange for 3B Eugenio Suárez. December 3 – Acquired RHP Cole Phillips and RHP Jackson Kowar from the Atlanta Braves in exchange for LHP Marco Gonzales, OF Jarred Kelenic, and 1B Evan White. December 28 – C Mitch Garver signed a two-year, $24 million contract. January 5, 2024 – Acquired RF Mitch Haniger, RHP Anthony DeSclafani, and cash from the San Francisco Giants in exchange for LHP Robbie Ray. January 29 – Acquired 2B Jorge Polanco from the Minnesota Twins in exchange for DeSclafani, RHP Justin Topa, OF Gabriel Gonzalez, RHP Darren Bowen, and cash. January 30 – Acquired 2B Samad Taylor from the Kansas City Royals for RHP Natanael Garabitos. February 3 – Acquired RHP Gregory Santos from the Chicago White Sox in exchange for RHP Prelander Berroa, OF Zach DeLoach, and the 69th pick in the 2024 MLB draft.
Regular season
Season standings American League West
American League Wild Card
Record vs. opponents
Record vs. American League
Record vs. National League
Season summary
After starting the season 4–8, the Mariners reached first place in the AL West on April 23 and held the division lead for almost three months, first falling to second place after the All-Star break. Starting pitcher Bryan Woo, injured to start the year, had a 1.07 earned run average (ERA) in his first six starts, the lowest in franchise history to begin a season. Closer Andrés Muñoz replaced Logan Gilbert as the team's representative in the MLB All-Star Game.
The Mariners were active at the trade deadline, adding Randy Arozarena, Justin Turner, Yimi García, and J. T. Chargois. However, Seattle fell out of first place on August 12, at the start of a five-game losing streak. Manager Scott Servais was fired on August 22, replaced by former Mariners catcher and broadcaster Dan Wilson. Julio Rodríguez, who was named the AL Player of the Week for September 15–21, helped power the offense during the final month of the season, but Seattle missed the playoffs by one game.
Catcher Cal Raleigh won the Gold Glove Award at catcher and Platinum Glove Award for the AL. Dylan Moore won the utility Gold Glove. Gilbert led the majors with innings pitched and 0.887 walks and hits per inning pitched. Starter George Kirby led the majors with 1.084 base on balls per nine innings pitched and a 7.783 strikeout-to-walk ratio. Raleigh ranked in the top 10 the AL in home runs, runs batted in, and strikeouts.
Transactions May 14 – Acquired SS Jake Slaughter and cash from the Chicago Cubs in exchange for RHP Tyson Miller. June 4 - Víctor Robles signed with the Mariners. July 25 - Acquired OF Randy Arozarena from the Tampa Bay Rays in exchange for RHP Brody Hopkins, OF Aidan Smith, and a player to be named later. July 26 - Acquired RHP Yimi García from the Toronto Blue Jays in exchange for OF Jonatan Clase and C Jacob Sharp. July 26 - Acquired OF Rhylan Thomas from the New York Mets in exchange for RHP Ryne Stanek. July 29 - Acquired DH/INF Justin Turner from the Blue Jays in exchange for OF RJ Schreck. July 30 - Acquired RHP J. T. Chargois from the Miami Marlins in exchange for RHP Will Schomberg. August 12 - Robles signed a two-year, $9.75 million contract extension.
Game log Legend Mariners win Mariners loss Postponement Eliminated from playoff raceBoldMariners team member
|- style="background:#fbb;" | 1 || March 28 || Red Sox || 4–6 || Bello (1–0) || Castillo (0–1) || Jansen (1) || 45,337 || 0–1 || L1 |- style="background:#bfb;" | 2 || March 29 || Red Sox || 1–0 || Kirby (1–0) || Pivetta (0–1) || Muñoz (1) || 30,013 || 1–1 || W1 |- style="background:#bfb;" | 3 || March 30 || Red Sox || 4–3 || Saucedo (1–0) || Rodríguez (0–1) || — || 32,149 || 2–1 || W2 |- style="background:#fbb;" | 4 || March 31 || Red Sox || 1–5 || Whitlock (1–0) || Miller (0–1) || Slaten (1) || 29,331 || 2–2 || L1 |- style="background:#bfb;" | 5 || April 1 || Guardians || 5–4 || Hancock (1–0) || McKenzie (0–1) || Stanek (1) || 21,322 || 3–2 || W1 |- style="background:#fbb;" | 6 || April 2 || Guardians || 2–5 || Bieber (2–0) || Castillo (0–2) || Clase (2) || 20,646 || 3–3 || L1 |- style="background:#fbb;" | 7 || April 3 || Guardians || 0–8 || Allen (2–0) || Kirby (1–1) || — || 22,583 || 3–4 || L2 |- style="background:#fbb;" | 8 || April 5 || @ Brewers || 5–6 || Uribe (1–0) || Muñoz (0–1) || — || 23,035 || 3–5 || L3 |- style="background:#bfb;" | 9 || April 6 || @ Brewers || 5–3 || Miller (1–1) || Hall (0–1) || Muñoz (2) || 35,522 || 4–5 || W1 |- style="background:#fbb;" | 10 || April 7 || @ Brewers || 4–12 || Rea (2–0) || Hancock (1–1) || Vieira (1) || 25,573 || 4–6 || L1 |- style="background:#fbb;" | 11 || April 8 || @ Blue Jays || 2–5 || Berríos (2–0) || Castillo (0–3) || — || 40,069 || 4–7 || L2 |- style="background:#fbb;" | 12 || April 9 || @ Blue Jays || 3–5 || Bassitt (1–2) || Kirby (1–2) || Green (2) || 31,310 || 4–8 || L3 |- style="background:#bfb;" | 13 || April 10 || @ Blue Jays || 6–1 || Muñoz (1–1) || Mayza (0–1) || — || 22,960 || 5–8 || W1 |- style="background:#bfb;" | 14 || April 12 || Cubs || 4–2 || Miller (2–1) || Wicks (0–2) || Stanek (2) || 33,500 || 6–8 || W2 |- style="background:#fbb;" | 15 || April 13 || Cubs || 1–4 || Imanaga (2–0) || Hancock (1–2) || Alzolay (2) || 38,104 || 6–9 || L1 |- style="background:#fbb;" | 16 || April 14 || Cubs || 2–3 || Assad (2–0) || Castillo (0–4) || Alzolay (3) || 32,423 || 6–10 || L2 |- style="background:#bfb;" | 17 || April 15 || Reds || 9–3 || Kirby (2–2) || Montas (2–2) || — || 16,008 || 7–10 || W1 |- style="background:#bfb;" | 18 || April 16 || Reds || 3–1 || Gilbert (1–0) || Pagán (1–1) || Saucedo (1) || 17,291 || 8–10 || W2 |- style="background:#bfb;" | 19 || April 17 || Reds || 5–1 || Miller (3–1) || Abbott (1–2) || — || 17,225 || 9–10 || W3 |- style="background:#bbb;" | — || April 19 || @ Rockies || colspan=8| Postponed (inclement weather); Makeup: April 21 |- style="background:#bfb;" | 20 || April 20 || @ Rockies || 7–0 || Castillo (1–4) || Hudson (0–4) || — || 25,376 || 10–10 || W4 |- style="background:#fbb;" | 21 || April 21 || @ Rockies || 1–2 || Lawrence (1–0) || Muñoz (1–2) || — || 33,283 || 10–11 || L1 |- style="background:#bfb;" | 22 || April 21 || @ Rockies || 10–2 || Hancock (2–2) || Lambert (2–1) || — || 19,756 || 11–11 || W1 |- style="background:#bfb;" | 23 || April 23 || @ Rangers || 4–0 || Gilbert (2–0) || Dunning (2–2) || — || 27,295 || 12–11 || W2 |- style="background:#fbb;" | 24 || April 24 || @ Rangers || 1–5 || Hernández (1–0) || Miller (3–2) || — || 31,896 || 12–12 || L1 |- style="background:#bfb;" | 25 || April 25 ||| @ Rangers || 4–3 || Castillo (2–4) || Heaney (0–3) || Muñoz (3) || 21,782 || 13–12 || W1 |- style="background:#bfb;" | 26 || April 26 || Diamondbacks || 6–1 || Hancock (3–2) || Gallen (3–2) || — || 33,997 || 14–12 || W2 |- style="background:#bfb;" | 27 || April 27 || Diamondbacks || 3–1 || Kirby (3–2) || Cecconi (1–1) || Muñoz (4) || 38,956 || 15–12 || W3 |- style="background:#fbb;" | 28 || April 28 || Diamondbacks || 2–3 || Mantiply (2–1) || Thornton (0–1) || Ginkel (5) || 33,474 || 15–13 || L1 |- style="background:#bfb;" | 29 || April 29 || Braves || 2–1 || Voth (1–0) || Minter (5–2) || — || 26,452 || 16–13 || W1 |- style="background:#bfb;" | 30 || April 30 || Braves || 3–2 || Castillo (3–4) || López (2–1) || Muñoz (5) || 23,534 || 17–13 || W2
|- style="background:#fbb;" | 31 || May 1 || Braves || 2–5 || Sale (4–1) || Hancock (3–3) || Iglesias (8) || 21,689 || 17–14 || L1 |- style="background:#fbb;" | 32 || May 3 || @ Astros || 3–5 || Martinez (2–2) || Speier (0–1) || Hader (3) || 33,796 || 17–15 || L2 |- style="background:#bfb;" | 33 || May 4 || @ Astros || 5–0 || Gilbert (3–0) || Valdez (1–1) || — || 34,206 || 18–15 || W1 |- style="background:#bfb;" | 34 || May 5 || @ Astros || 5–4 || Muñoz (2–2) || Hader (1–3) || — || 36,280 || 19–15 || W2 |- style="background:#fbb;" | 35 || May 6 || @ Twins || 1–3 || Jax (3–2) || Castillo (3–5) || Thielbar (3) || 14,384 || 19–16 || L1 |- style="background:#bfb;" | 36 || May 7 || @ Twins || 10–6 || Stanek (1–0) || Alcalá (1–1) || — || 14,710 || 20–16 || W1 |- style="background:#fbb;" | 37 || May 8 || @ Twins || 3–6 || Paddack (4–1) || Kirby (3–3) || Durán (3) || 15,685 || 20–17 || L1 |- style="background:#fbb;" | 38 || May 9 || @ Twins || 1–11 || López (4–2) || Gilbert (3–1) || — || 22,154 || 20–18 || L2 |- style="background:#bfb;" | 39 || May 10 || Athletics || 8–1 || Thornton (1–1) || Blackburn (3–2) || — || 39,743 || 21–18 || W1 |- style="background:#fbb;" | 40 || May 11 || Athletics || 1–8 || Estes (1–0) || Miller (3–3) || — || 32,398 || 21–19 || L1 |- style="background:#bfb;" | 41 || May 12 || Athletics || 8–4 || Castillo (4–5) || Wood (1–3) || — || 41,609 || 22–19 || W1 |- style="background:#bfb;" | 42 || May 13 || Royals || 6–2 || Kirby (4–3) || Singer (3–2) || Muñoz (6) || 14,984 || 23–19 || W2 |- style="background:#fbb;" | 43 || May 14 || Royals || 2–4 || Wacha (3–4) || Gilbert (3–2) || McArthur (10) || 20,665 || 23–20 || L1 |- style="background:#bfb;" | 44 || May 15 || Royals || 4–2 || Woo (1–0) || Marsh (3–1) || Muñoz (7) || 22,233 || 24–20 || W1 |- style="background:#fbb;" | 45 || May 17 || @ Orioles || 2–9 || Means (2–0) || Miller (3–4) || — || 38,882 || 24–21 || L1 |- style="background:#bfb;" | 46 || May 18 || @ Orioles || 4–3 || Stanek (2–0) || Canó (2–2) || Muñoz (8) || 19,286 || 25–21 || W1 |- style="background:#fbb;" | 47 || May 19 || @ Orioles || 3–6 || Burnes (4–2) || Kirby (4–4) || Kimbrel (9) || 30,494 || 25–22 || L1 |- style="background:#bfb;"