2026 Seattle Mariners season

The 2026 Seattle Mariners season will be the 50th season in franchise history and their 27th full season (28th overall) at T-Mobile Park, their home ballpark in Seattle, Washington. The Mariners will open and close their season in Seattle, with opening day on March 26 against the Cleveland Guardians and the regular season finale on September 27 against the Los Angeles Angels. The team is looking to improve their performance from their previous season, where they reached the 2025 American League Championship Series.

The Mariners plan to retire Randy Johnson's uniform number 51 on May 2. The team retired the number in 2025 for Ichiro Suzuki. The Mariners will wear a uniform patch commemorating their 50th season.

Offseason

Coming off an AL West division title and American League Championship Series appearance, the Mariners acted early in the offseason, re-signing first baseman Josh Naylor, who had been a 2025 mid-season pickup, to a five-year contract in mid-November 2025.

On December 5, the Mariners announced their coaching staff for 2026. Two former coaches left for bench coach jobs, with third base coach Kristopher Negrón joining the Pittsburgh Pirates and bullpen coach Tony Arnerich going to the Cleveland Guardians. Carlos Cardoza, previously the Frisco RoughRiders manager, was named the third base coach, and former Mariner catcher Austin Nola began his coaching career as the bullpen coach. Jake McKinley, formerly the Nevada Wolf Pack coach, was named the field coordinator, replacing Louis Boyd, who took another role with the Mariners. Seattle retained all other coaches from 2025.

The Mariners made two trades to fill areas of need and send out prospects, acquiring reliever José A. Ferrer from the Washington Nationals for catcher Harry Ford and getting utility player Brendan Donovan from the St. Louis Cardinals for four minor leaguers and a draft pick.

The Mariners made smaller signings to fill smaller roles, signing Rob Refsnyder as a right-handed bat to face lefties and signing Andrew Knizner and Mitch Garver for the backup catcher job.

Pitcher Logan Evans had Tommy John surgery in January 2026, with an expected 12-month recovery.

Transactions

• November 2, 2025: Josh Naylor, Eugenio Suárez, Caleb Ferguson, and Luke Jackson elected free agency.
• November 3: The Mariners declined Mitch Garver's $12 million mutual option, paying him a $1 million buyout and making him a free agent.
• November 5: Pitcher Cole Wilcox traded by the Tampa Bay Rays to Seattle for cash.
• November 6: Jorge Polanco declined a $6 million option, receiving a $750,000 buyout, and elected free agency. The Mariners claimed pitcher Ryan Loutos off waivers from the Washington Nationals.
• November 16: Minor league pitcher Robinson Ortiz traded by the Los Angeles Dodgers to Seattle for minor league pitcher Tyler Gough.
• November 17: Naylor signed a five-year, $92.5 million contract with the Mariners.
• November 18: The Boston Red Sox traded minor league pitcher Alex Hoppe to the Mariners for minor league catcher Luke Heyman. The Mariners designated pitcher Tayler Saucedo for assignment. Saucedo elected free agency two days later.
• November 21: The Mariners non-tendered Trent Thornton and Gregory Santos, making them free agents.
• November 25: Pitcher Casey Lawrence re-signed with Seattle on a minor league contract.
• December 6: The Mariners acquired relief pitcher José A. Ferrer from the Washington Nationals for catcher Harry Ford and pitcher Isaac Lyon.
• December 16: Catcher Andrew Knizner signed a one-year, $1 million contract.
• December 22: Outfielder Rob Refsnyder signed a one-year, $6.25 million contract.
• January 23, 2026: The Mariners acquired pitcher Cooper Criswell from the New York Mets for cash. Pitcher Jhonathan Díaz designated for assignment. Díaz was sent outright to Triple-A on January 28.
• January 27: The Mariners claimed catcher Jhonny Pereda off waivers from the Minnesota Twins. Reliever Jackson Kowar was designated for assignment and would be claimed by the Twins.
• February 2: The Mariners acquired utility player Brendan Donovan from the St. Louis Cardinals for prospects Jurrangelo Cijntje, Tai Peete, Colton Ledbetter, and a competitive balance round B draft pick. The Mariners sent third baseman Ben Williamson to the Rays, who sent another draft pick to St. Louis to complete the deal.
• February 16: Pitcher Josh Simpson traded by the Miami Marlins to Seattle for cash. Pitcher Logan Evans placed on the 60-day injured list, recovering from Tommy John surgery.
• February 26: Garver re-signed with Seattle on a minor league contract.

Spring training

Pitchers and catchers reported to the Mariners' spring training facility, the Peoria Sports Complex, between February 9 and 11, with the first spring training game held on February 20, against the San Diego Padres, who also train in Peoria, Arizona.

The Mariners non-roster invitees to spring training included top prospects, such as Colt Emerson, Ryan Sloan, and Kade Anderson; former major leaguers on minor league contracts Dane Dunning, Patrick Wisdom, and Randy Dobnak; and returning organizational players including Casey Lawrence, Austin Kitchen, and Guillo Zuñiga.

Pitcher Bryce Miller and shortstop J. P. Crawford dealt with injuries in late February.

World Baseball Classic

The Mariners had 16 players selected to play in the 2026 World Baseball Classic (WBC), held during spring training, including six minor leaguers. Outfielders Julio Rodríguez and Randy Arozarena returned to the Dominican Republic and Mexico, respectively, with All-Star closer Andrés Muñoz also playing for Mexico. Prior to the WBC rosters being announced in February, both Cal Raleigh and Gabe Speier committed to the United States. Josh Naylor was the captain for Canada, after previously playing in the 2017 WBC. Reliever Eduard Bazardo joined Venezuela. Part-time players Dominic Canzone and Miles Mastrobuoni joined Italy. South Korea selected minor league signee Dane Dunning, while prospect Michael Arroyo and reliever Guillo Zuñiga joined Colombia, and four other minor league pitchers were chosen by other national teams.

During a U.S.–Mexico game on March 10, Arozarena, ahead of his first plate appearance, attempted to shake Raleigh's hand, which Raleigh declined.

Regular season

Game log

|-style="background:#fbb;" | 1 || March 26 || Guardians || 4–6 || Brogdon (1–0) || Speier (0–1) || Smith (1) || 44,938 || 0–1 || L1 |-style="background:#bfb;" | 2 || March 27 || Guardians || 5–1 || Kirby (1–0) || Williams (0–1) || — || 36,987 || 1–1 || W1 |-style="background:#fbb;" | 3 || March 28 || Guardians || 5–6 || Smith (1–0) || Muñoz (0–1) || Brogdon (1) || 43,283 || 1–2 || L1 |-style="background:#bfb;" | 4 || March 29 || Guardians || 8–0 || Hancock (1–0) || Cecconi (0–1) || Criswell (1) || 30,800 || 2–2 || W1 |-style="background:#bfb;" | 5 || March 30 || Yankees || 2–1 || Brash (1–0) || Blackburn (0–1) || — || 27,291 || 3–2 || W2 |-style="background:#fbb;" | 6 || March 31 || Yankees || 0–5 || Fried (2–0) || Gilbert (0–1) || — || 32,790 || 3–3 || L1 |-style="background:#fbb;" | 7 || April 1 || Yankees || 3–5 || Schlittler (2–0) || Kirby (1–1) || Bednar (3) || 23,415 || 3–4 || L2 |-style="background:#;" | 8 || April 3 || @ Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 9 || April 4 || @ Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 10 || April 5 || @ Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 11 || April 6 || @ Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 12 || April 7 || @ Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 13 || April 8 || @ Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 14 || April 10 || Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 15 || April 11 || Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 16 || April 12 || Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 17 || April 13 || Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 18 || April 14 || @ Padres || — || (—) || (—) || — || || — || |-style="background:#;" | 19 || April 15 || @ Padres || — || (—) || (—) || — || || — || |-style="background:#;" | 20 || April 16 || @ Padres || — || (—) || (—) || — || || — || |-style="background:#;" | 21 || April 17 || Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 22 || April 18 || Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 23 || April 19 || Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 24 || April 20 || Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 25 || April 21 || Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 26 || April 22 || Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 27 || April 24 || @ Cardinals || — || (—) || (—) || — || || — || |-style="background:#;" | 28 || April 25 || @ Cardinals || — || (—) || (—) || — || || — || |-style="background:#;" | 29 || April 26 || @ Cardinals || — || (—) || (—) || — || || — || |-style="background:#;" | 30 || April 27 || @ Twins || — || (—) || (—) || — || || — || |-style="background:#;" | 31 || April 28 || @ Twins || — || (—) || (—) || — || || — || |-style="background:#;" | 32 || April 29 || @ Twins || — || (—) || (—) || — || || — ||

|-style="background:#;" | 33 || May 1 || Royals || — || (—) || (—) || — || || — || |-style="background:#;" | 34 || May 2 || Royals || — || (—) || (—) || — || || — || |-style="background:#;" | 35 || May 3 || Royals || — || (—) || (—) || — || || — || |-style="background:#;" | 36 || May 4 || Braves || — || (—) || (—) || — || || — || |-style="background:#;" | 37 || May 5 || Braves || — || (—) || (—) || — || || — || |-style="background:#;" | 38 || May 6 || Braves || — || (—) || (—) || — || || — || |-style="background:#;" | 39 || May 8 || @ White Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 40 || May 9 || @ White Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 41 || May 10 || @ White Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 42 || May 11 || @ Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 43 || May 12 || @ Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 44 || May 13 || @ Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 45 || May 14 || @ Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 46 || May 15 || Padres || — || (—) || (—) || — || || — || |-style="background:#;" | 47 || May 16 || Padres || — || (—) || (—) || — || || — || |-style="background:#;" | 48 || May 17 || Padres || — || (—) || (—) || — || || — || |-style="background:#;" | 49 || May 18 || White Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 50 || May 19 || White Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 51 || May 20 || White Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 52 || May 22 || @ Royals || — || (—) || (—) || — || || — || |-style="background:#;" | 53 || May 23 || @ Royals || — || (—) || (—) || — || || — || |-style="background:#;" | 54 || May 24 || @ Royals || — || (—) || (—) || — || || — || |-style="background:#;" | 55 || May 25 || @ Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 56 || May 26 || @ Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 57 || May 27 || @ Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 58 || May 29 || Diamondbacks || — || (—) || (—) || — || || — || |-style="background:#;" | 59 || May 30 || Diamondbacks || — || (—) || (—) || — || || — || |-style="background:#;" | 60 || May 31 || Diamondbacks || — || (—) || (—) || — || || — ||

|-style="background:#;" | 61 || June 1 || Mets || — || (—) || (—) || — || || — || |-style="background:#;" | 62 || June 2 || Mets || — || (—) || (—) || — || || — || |-style="background:#;" | 63 || June 3 || Mets || — || (—) || (—) || — || || — || |-style="background:#;" | 64 || June 5 || @ Tigers || — || (—) || (—) || — || || — || |-style="background:#;" | 65 || June 6 || @ Tigers || — || (—) || (—) || — || || — || |-style="background:#;" | 66 || June 7 || @ Tigers || — || (—) || (—) || — || || — || |-style="background:#;" | 67 || June 8 || @ Orioles || — || (—) || (—) || — || || — || |-style="background:#;" | 68 || June 9 || @ Orioles || — || (—) || (—) || — || || — || |-style="background:#;" | 69 || June 10 || @ Orioles || — || (—) || (—) || — || || — || |-style="background:#;" | 70 || June 11 || @ Orioles || — || (—) || (—) || — || || — || |-style="background:#;" | 71 || June 12 || @ Nationals || — || (—) || (—) || — || || — || |-style="background:#;" | 72 || June 13 || @ Nationals || — || (—) || (—) || — || || — || |-style="background:#;" | 73 || June 14 || @ Nationals || — || (—) || (—) || — || || — || |-style="background:#;" | 74 || June 16 || Orioles || — || (—) || (—) || — || || — || |-style="background:#;" | 75 || June 17 || Orioles || — || (—) || (—) || — || || — || |-style="background:#;" | 76 || June 18 || Orioles || — || (—) || (—) || — || || — || |-style="background:#;" | 77 || June 20 || Red Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 78 || June 20 || Red Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 79 || June 21 || Red Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 80 || June 23 || @ Pirates || — || (—) || (—) || — || || — || |-style="background:#;" | 81 || June 24 || @ Pirates || — || (—) || (—) || — || || — || |-style="background:#;" | 82 || June 25 || @ Pirates || — || (—) || (—) || — || || — || |-style="background:#;" | 83 || June 26 || @ Guardians || — || (—) || (—) || — || || — || |-style="background:#;" | 84 || June 27 || @ Guardians || — || (—) || (—) || — || || — || |-style="background:#;" | 85 || June 28 || @ Guardians || — || (—) || (—) || — || || — || |-style="background:#;" | 86 || June 29 || Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 87 || June 30 || Angels || — || (—) || (—) || — || || — ||

|-style="background:#;" | 88 || July 2 || Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 89 || July 3 || Blue Jays || — || (—) || (—) || — || || — || |-style="background:#;" | 90 || July 4 || Blue Jays || — || (—) || (—) || — || || — || |-style="background:#;" | 91 || July 5 || Blue Jays || — || (—) || (—) || — || || — || |-style="background:#;" | 92 || July 7 || @ Marlins || — || (—) || (—) || — || || — || |-style="background:#;" | 93 || July 8 || @ Marlins || — || (—) || (—) || — || || — || |-style="background:#;" | 94 || July 9 || @ Marlins || — || (—) || (—) || — || || — || |-style="background:#;" | 95 || July 10 || @ Rays || — || (—) || (—) || — || || — || |-style="background:#;" | 96 || July 11 || @ Rays || — || (—) || (—) || — || || — || |-style="background:#;" | 97 || July 12 || @ Rays || — || (—) || (—) || — || || — || |- style="text-align:center; background:#bbcaff;" | colspan="10" | 96th All-Star Game in Philadelphia, PA |-style="background:#;" | 98 || July 17 || Giants || — || (—) || (—) || — || || — || |-style="background:#;" | 99 || July 18 || Giants || — || (—) || (—) || — || || — || |-style="background:#;" | 100 || July 19 || Giants || — || (—) || (—) || — || || — || |-style="background:#;" | 101 || July 20 || Reds || — || (—) || (—) || — || || — || |-style="background:#;" | 102 || July 21 || Reds || — || (—) || (—) || — || || — || |-style="background:#;" | 103 || July 22 || Reds || — || (—) || (—) || — || || — || |-style="background:#;" | 104 || July 24 || @ Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 105 || July 25 || @ Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 106 || July 26 || @ Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 107 || July 27 || @ Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 108 || July 28 || @ Dodgers || — || (—) || (—) || — || || — || |-style="background:#;" | 109 || July 29 || @ Dodgers || — || (—) || (—) || — || || — || |-style="background:#;" | 110 || July 30 || @ Dodgers || — || (—) || (—) || — || || — || |-style="background:#;" | 111 || July 31 || Twins || — || (—) || (—) || — || || — ||

|-style="background:#;" | 112 || August 1 || Twins || — || (—) || (—) || — || || — || |-style="background:#;" | 113 || August 2 || Twins || — || (—) || (—) || — || || — || |-style="background:#;" | 114 || August 4 || Tigers || — || (—) || (—) || — || || — || |-style="background:#;" | 115 || August 5 || Tigers || — || (—) || (—) || — || || — || |-style="background:#;" | 116 || August 6 || Tigers || — || (—) || (—) || — || || — || |-style="background:#;" | 117 || August 7 || Rays || — || (—) || (—) || — || || — || |-style="background:#;" | 118 || August 8 || Rays || — || (—) || (—) || — || || — || |-style="background:#;" | 119 || August 9 || Rays || — || (—) || (—) || — || || — || |-style="background:#;" | 120 || August 11 || @ Yankees || — || (—) || (—) || — || || — || |-style="background:#;" | 121 || August 12 || @ Yankees || — || (—) || (—) || — || || — || |-style="background:#;" | 122 || August 13 || @ Yankees || — || (—) || (—) || — || || — || |-style="background:#;" | 123 || August 14 || @ Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 124 || August 15 || @ Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 125 || August 16 || @ Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 126 || August 18 || @ Brewers || — || (—) || (—) || — || || — || |-style="background:#;" | 127 || August 19 || @ Brewers || — || (—) || (—) || — || || — || |-style="background:#;" | 128 || August 20 || @ Brewers || — || (—) || (—) || — || || — || |-style="background:#;" | 129 || August 21 || Cubs || — || (—) || (—) || — || || — || |-style="background:#;" | 130 || August 22 || Cubs || — || (—) || (—) || — || || — || |-style="background:#;" | 131 || August 23 || Cubs || — || (—) || (—) || — || || — || |-style="background:#;" | 132 || August 24 || Phillies || — || (—) || (—) || — || || — || |-style="background:#;" | 133 || August 25 || Phillies || — || (—) || (—) || — || || — || |-style="background:#;" | 134 || August 26 || Phillies || — || (—) || (—) || — || || — || |-style="background:#;" | 135 || August 28 || @ Blue Jays || — || (—) || (—) || — || || — || |-style="background:#;" | 136 || August 29 || @ Blue Jays || — || (—) || (—) || — || || — || |-style="background:#;" | 137 || August 30 || @ Blue Jays || — || (—) || (—) || — || || — || |-style="background:#;" | 138 || August 31 || @ Red Sox || — || (—) || (—) || — || || — ||

|-style="background:#;" | 139 || September 1 || @ Red Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 140 || September 2 || @ Red Sox || — || (—) || (—) || — || || — || |-style="background:#;" | 141 || September 3 || Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 142 || September 4 || Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 143 || September 5 || Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 144 || September 6 || Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 145 || September 8 || Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 146 || September 9 || Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 147 || September 10 || Rangers || — || (—) || (—) || — || || — || |-style="background:#;" | 148 || September 11 || @ Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 149 || September 12 || @ Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 150 || September 13 || @ Athletics || — || (—) || (—) || — || || — || |-style="background:#;" | 151 || September 14 || @ Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 152 || September 15 || @ Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 153 || September 16 || @ Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 154 || September 18 || @ Rockies || — || (—) || (—) || — || || — || |-style="background:#;" | 155 || September 19 || @ Rockies || — || (—) || (—) || — || || — || |-style="background:#;" | 156 || September 20 || @ Rockies || — || (—) || (—) || — || || — || |-style="background:#;" | 157 || September 22 || Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 158 || September 23 || Astros || — || (—) || (—) || — || || — || |-style="background:#;" | 159 || September 24 || Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 160 || September 25 || Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 161 || September 26 || Angels || — || (—) || (—) || — || || — || |-style="background:#;" | 162 || September 27 || Angels || — || (—) || (—) || — || || — ||

<small>Source</small>

Season standings

American League West

American League Wild Card

Record against opponents

Roster

Farm system

<small>Sources</small>

The Mariners will have a new Single-A affiliate in 2026, as Diamond Baseball Holdings moved the Modesto Nuts after the 2025 season to San Bernardino to become the Inland Empire 66ers.

References

External links