Seattle Mariners: Breaking News, Rumors & Highlights

Keep an Eye on the Mariners’ Back-End Bullpen Trio

Fresh off an American League West title in 2025, the Seattle Mariners remain one of Major League Baseball’s top teams. Led by Cal Raleigh and Julio Rodríguez, the squad remains hungry and will be back in the hunt for their first World Series title in 2026.

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Cooper Criswell finds a role with the Mariners

Starter, reliever, long guy – it doesn’t matter to Cooper Criswell. He’ll embrace whatever role the team wants to give him. “My dad was a basketball coach for 30-plus years, and he always told his teams, every guy on a team has a role, and you need to know your role,” Criswell said.

Bryan Woo News / Seattle Mariners on SI / March 5

Mariners Ace continues his sharp Spring, as he pitches in Arizona, not the WBC

Strangely, losing games has still proved to be fortuitous for the Mariners in Spring Training play, as they get set to defend their AL West Championship.

Seattle Mariners News / Lookout Landing / March 5

Mariners prove “close” only counts sometimes in baseball, lose 9-4

It never feels good to have someone tell you that “almost isn’t good enough,” or that “close doesn’t cut it.” Growing up in the south, the phrase I always

Aaron Judge News / Yardbarker Quizzes

The '50-HR, .300 average MLB seasons' quiz

How many of the 20 MLB players to bat .300 and mash 50 home runs in the same season can you name in five minutes?

The 'Last 40-homer season by MLB team' quiz

The 'Active 100-RBI MLB season leaders' quiz

The 'Live-Ball Era strikeout leaders' quiz

Seattle Mariners News / Lookout Landing / March 4

Mariners Spring Training 2026, Game #12

With the start of the World Baseball Classic, many Mariners are on loan to their respective national teams. As such, get ready to see some weird looks from the M’s as the organization gives some unusual opportunities to top prospects.

Athletics News / Yardbarker

One storyline to follow for every MLB team in 2026

As Spring Training opens for 2026, all 30 teams have high hopes and big questions. These are the storylines to follow for each team heading into Opening Day.

Seattle Mariners News / Just Baseball / March 4

Down on the Farm: Mariners Top Prospect Notes

Even after acquiring Brendan Donovan, the Seattle Mariners have one of baseball’s best farm systems, headlined by three top 30 prospects and five in the preseason top 100.

Colt Emerson News / Lookout Landing / March 4

Colt Emerson Taps To the Top

Seattle Mariners prospect Colt Emerson found out the hard way you can have too much of a good thing. After two successful minor-league seasons, Emerson was pleased, but not satisfied.

Seattle Mariners News / Lookout Landing / March 3

Mariners Prospect Rankings #14, RHP Christian Little

By our means of ranking prospects here on the site, RHP Christian Little is largely de facto roof of a tier of M’s prospects. Very little separated Little, Tyler Cleveland, Alex Hoppe, Jared Sundstrom, Mason Peters, and Charlie Beilenson, while Thursday’s prospect will have as much separation from Little as he from Beilenson at 19th.

Brendan Donovan News / Seattle Mariners on SI / March 3

MLB Announcer calls Mariners' Brendan Donovan a 'humongous, tremendous' addition

By now, the votes are in, and it's official: Acquiring Brendan Donovan already looks like one of the best moves in Seattle Mariners' franchise history.

Seattle Mariners News / Last Word On Sports / March 2

Mariners Position Battle for Second Base

With the 2026 season approaching, the question of the Opening Day starting lineup is arising. The main question is, who will be the starting second baseman, with a few options to choose from.

Seattle Mariners News / Total Pro Sports / March 2

'Does Just About Anything You Need To Win' – Mariners President Hails 'Missing Ingredient' Brendan Donovan

Brendan Donovan became a hot commodity on the trade market this winter after his excellent 2025 campaign for the St. Louis Cardinals. Several organizations reportedly pursued Donovan for a two-month period in the offseason to no avail.

Athletics News / Yardbarker

25 MLB players that could be traded during the 2026 season

The 2026 MLB season is right around the corner, and it is never too early to start thinking about how it might unfold. Seemingly, every year, we have a decent handle on who should contend and who is likely to struggle, which makes looking ahead to the trade deadline inevitable.

Ryan Sloan News / Seattle Mariners on SI / March 2

19-year-old Ryan Sloan brings the heat in the Mariners loss to the Rangers

If wins and losses mattered in Spring Training? Then the Mariners fan base would be in panic mode over the current losing trend taking place out in Peoria, Arizona.

Seattle Mariners News / Last Word On Sports / March 2

Mariners Storylines to Watch Out for at the WBC

With MLB Opening Weekend fast approaching, the season is now upon us. The Seattle Mariners will be the most represented team in the WBC with 16 players reporting for their respective countries.

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The 'Active NFL carries leaders' quiz

The 'Most passing + rushing TD games' quiz

The 'NBA 30-point game leaders' quiz

The 'College basketball mythical mascots' quiz

Bryce Miller News / Athlon Sports / February 28

Bryce Miller's Sudden Injury Leaves Mariners With Rotation Question

The Seattle Mariners are expected to have one of the best starting rotations in all of MLB this season. On Saturday, however, Daniel Kramer of MLB.com revealed that right-handed starter Bryce Miller is dealing with an injury concern.

Seattle Mariners News / MLB on ClutchPoints / February 28

Mariners’ JP Crawford, Bryce Miller receive important spring training injury updates

The Seattle Mariners are facing a challenging start to the 2026 spring training season as they aim to build on their recent ALCS appearance. Earlier this month, there was optimism surrounding young pitcher Bryce Miller, who reported feeling 100% after an elbow injury hampered his 2025 season.

Seattle Mariners News / Inside The Rink / February 28

ECHL Game Recap: Maine Mariners vs Adirondack Thunder | 02/27/2026

The Adirondack Thunder kicked off Stick It To Cancer Night on Friday Night as they looked to extend their win streak against the Maine Mariners. Coming into the game, both teams had been playing some good hockey as the Maine had won their last five games, all of which came on the road.

Luis Castillo News / Athlon Sports / February 27

Mariners' Luis Castillo Made 1 Pivot That Could Change Everything

The Seattle Mariners feature one of the best starting rotations in all of MLB. Bryan Woo was a breakout star last year, while Logan Gilbert is an ace-caliber starter.

Seattle Mariners News / Sneakers on SI / February 26

Ken Griffey Jr.'s Nike Sneakers Return in Retro Mariners Colors

Spring Training is here, and it is the most wonderful time of the year for baseball fans. Even better, all of the major brands are rolling out new and retro gear to celebrate the start of the new season.

Seattle Mariners News / Last Word On Sports / February 25

The Mariners’ Bullpen Blueprint: Defining Their Profile – Part 1

The Seattle Mariners have built one of the best bullpens in baseball, whether by trade or by player development. Seattle has become known not only for their ability to identify talent but also to develop it — often seeing certain traits others may not see and moulding a player to fit the Seattle mould.

Seattle Mariners News / New Baseball Media / February 25

2025-26 MLB Offseason Recap: Seattle Mariners

The 2025 Seattle Mariners came one win away from the team’s first-ever American League pennant. While Seattle was unsuccessful in its quest for a World Series berth, the team is still very much a contender to make it to the Fall Classic in 2026.

Bryan Woo News / Total Pro Sports / February 25

MLB Insider’s Bold Seattle Mariners-Bryan Woo Verdict Will Send Fans Into a Frenzy

The Seattle Mariners enjoyed a somewhat unexpected but hugely successful 2025 campaign after claiming the American League West title. In a strong postseason run, they went agonizingly close to clinching the AL pennant before losing the Champions Series to the Toronto Blue Jays.

Julio Rodriguez News / MLB on ClutchPoints / February 24

Mariners star Julio Rodriguez issues clear statement after posting career highs in 2025

The Seattle Mariners received a calm yet powerful message from their franchise star as spring training ramps up in Peoria. Julio Rodriguez, fresh off career highs in 2025, has made it clear that his next leap in the 2026 season will be fueled by trust—not tension.

MLB News / MLB Trade Rumors / February 23

Mariners Were Reluctant To Discuss Cole Young In Ketel Marte Talks

Among players who were not traded this offseason, few found themselves in more rumors than Ketel Marte. Arizona general manager Mike Hazen maintained throughout the winter that a trade was unlikely and said last month that talks never got close to a deal.

Seattle Mariners News / Total Pro Sports / February 23

Seattle Mariners 2026 Projected Lineup: Batting Order, Rotation & More

The Seattle Mariners enjoyed a highly successful 2025 campaign, undoubtedly one of the most memorable in the history of the franchise. However, they are still pursuing the maiden World Series crown for their loyal fanbase.

Seattle Mariners News / Total Apex Sports / February 21

Can the Seattle Mariners Overcome Less Power and Still Win In 2026?

The Seattle Mariners are heading into Spring Training with a roster that looks oddly familiar—and that’s actually a good thing. After their deepest playoff run in franchise history last season, the M’s are bringing back most of the squad that got them there.