Seattle Mariners: Breaking News, Rumors & Highlights

Seattle Mariners Officially Cut Ties With 5-Year MLB Veteran

Seattle Mariners utility player Miles Mastrobuoni has elected free agency, via the MiLB transaction log. The move ends his tenure in the organization after two seasons and marks the formal conclusion of a year spent mostly in Triple-A following repeated roster decisions at the major-league level.

Features

The Morning Bark

The Quiz of the Day

4 Mariners Prospects Who Could Play Major Roles in 2027, Plus 3 Sleepers

The Mariners can promote all the young talent they want. Eventually, somebody will have to claim a job. Their 2027 youth movement will be more interesting than the next round of prospect rankings.

Seattle Mariners News / Seattle Mariners on SI / October 15

4 Trade Targets Who Could Solve the Mariners’ Biggest Problem

The Mariners don’t need to build another offseason around collecting options. They should be in an aggressive pursuit of a position player who makes the lineup harder to pitch against.

Seattle Mariners News / Lookout Landing / October 15

Mariners News: Boston Smith, Cole Young, and Joe Espada

Hello everyone and happy Thursday! Here’s everything you may have missed from the baseball world yesterday. The Dodgers are just one game away from being swept in the NLCS following a 6-2 Brewers victory powered by a trio of homers.

Milwaukee Brewers News / Yardbarker Quizzes

The 'NLCS MVPs' quiz

MLB has been awarding the National League Championship Series MVP Award since the 1977 season. How many of the winners can you name in six minutes?

The 'Last MVP by MLB team 'quiz

The 'Platinum Glove winners since 2011' quiz

The 'Last 100-RBI season by team' quiz

Seattle Mariners News / Baseball Now / October 14

Mariners Reportedly Meeting With Rival Manager

Coming off a disappointing 76-86 season and a third-place finish in the AL West, the Seattle Mariners are in the market for a new manager. After dismissing Dan Wilson from his managerial duties, the Mariners are looking for a new skipper this offseason.

Athletics News / Yardbarker

25 things we learned from the 2026 MLB season

The 2026 MLB season was full of great performances, breakout stars, and incredible feats. These are the 25 things we learned along the way.

Logan Gilbert News / Seattle Mariners on SI / October 14

The Mariners Player Most Likely to Be Traded This Offseason

Whether we like it or not, Logan Gilbert is the most logical trade candidate on the Mariners’ roster. He also might be the player the team can least afford to trade.

Randy Arozarena News / Seattle Mariners on SI / October 13

Randy Arozarena Prediction Puts Mariners’ $100 Million Spending Test Under the Microscope

A $100 million contract for a 31-year-old outfielder doesn’t sound like a typical Jerry Dipoto move. Which is precisely why Randy Arozarena’s impending free agency will tell us something important about the Seattle Mariners.

MLB News / Yardbarker / October 13

Mariners reportedly set to meet with Joe Espada regarding manager job

The Seattle Mariners' next manager could be a familiar face from the opposing dugout.

Three questions facing the Seattle Mariners this offseason

The 'Active 150-hit MLB seasons' quiz

Seattle Mariners News / Larry Brown Sports / October 13

Mariners may hire new manager away from division rival

The Seattle Mariners need a new manager, and they may take the unusual step of hiring one directly away from an AL West rival. The Mariners plan to meet with Houston Astros manager Joe Espada regarding their managerial vacancy, according to Mark Feinsand, Daniel Kramer, and Brian McTaggart of MLB.com.

Seattle Mariners News / Seattle Mariners on SI / October 13

One Offseason Mistake the Mariners Cannot Afford to Repeat

A real contender shouldn’t spend 129 plate appearances figuring out whether a part-time hitter belongs in the middle of its plans. The Mariners did that with Rob Refsnyder.

Athletics News / Yardbarker

25 records that were broken during the 2026 MLB season

The 2026 MLB season was historic in many ways. These 25 records were broken during the season.

Randy Arozarena News / Seattle Mariners on SI / October 12

Mariners Should Give Randy Arozarena a Qualifying Offer to Fuel Free-Agent Pursuit

The Mariners’ first decision on Randy Arozarena should be an easy one. They should at least give him the qualifying offer. Arozarena just slashed .281/.381/.484 with 26 home runs, 26 stolen bases and an .865 OPS.

Seattle Mariners News / Seattle Mariners on SI / October 12

Mariners Should Break Bullpen Spending Habit to Sign Padres Reliever Adrián Morejón

We know that the Mariners can build a bullpen on a budget. They will spin a waiver claim into a decent sixth-inning arm and squeeze leverage innings out of somebody another organization overlooked.

Click here to get Yardbarker's Quiz of the Day emailed to you!

The '35-TD, 10-INT NFL seasons' quiz

The '100-yard, 1-rushing TD games' quiz

The 'Most 100-rushing-yard NFL games' quiz

The 'QB season rushing-TD leaders' quiz

Seattle Mariners News / Seattle Mariners on SI / October 12

The Position the Mariners Must Address for This Offseason to Be a Success

We already know how this story usually goes. The Mariners collect some versatile players and mix and match their lineup. They'll spend half the season searching for an offensive combination that sticks.

Trent Grisham News / Seattle Mariners on SI / October 11

Bleacher Report Predicts Trent Grisham to Mariners, Creating a Major 2027 Lineup Problem

Trent Grisham would definitely give the Mariners another capable outfielder and legitimate insurance behind Julio Rodríguez in center field. But wouldn’t he make the Mariners predominantly left-handed lineup even more absurdly left-handed?

Kade Anderson News / Seattle Mariners on SI / October 11

Mariners’ 2027 Starting Rotation Projection Puts Kade Anderson in the Starting Five

Luis Castillo is gone, and the Seattle Mariners will have a new veteran buffer at the top of their rotation. It’s not like they’re scrambling for more arms.

Seattle Mariners News / Yardbarker / October 10

Three questions facing the Seattle Mariners this offseason

The Mariners are at a crossroads heading into the offseason.

Former MLB GM believes Braves should target Randy Arozarena

The 'Switch-hitter 35-HR seasons' quiz

Seattle Mariners News / Just Baseball / October 7

Seattle Mariners Arbitration Projections and Tender Decisions

Once a team comes up with its projected salary for all of its arbitration-eligible players, it will begin a tender analysis to simply determine: “Are we comfortable guaranteeing Player X this much money?” If the answer is yes, the player will be tendered a contract prior to the mid-November Tender Deadline.

Seattle Mariners News / MLB Trade Rumors / October 6

Mariners announce surgeries for Cal Raleigh, Josh Naylor

The Mariners announced that catcher Cal Raleigh and Josh Naylor underwent surgical procedures on October 3. Both players are expected to be recovered before the start of spring training.

George Kirby News / MLB Trade Rumors / October 5

George Kirby’s Fastball Failed Him

Mariners right-hander George Kirby just put together the worst season of his career. He stumbled to a 4.33 ERA as one of the key contributors to a disappointing season for Seattle’s vaunted rotation.

Seattle Mariners News / Just Baseball / October 1

Five Mariners Who Need To Be Better Next Season

At the start of every season, fans take a look at the Seattle Mariners roster and wonder if it will finally be the season when they win it all. This year was surely no exception.

Jerry Dipoto News / Athlon Sports / September 29

Mariners GM Jerry Dipoto says Seattle will hire from outside the organization to find its next manager: 'We need fresh thought, we need something new'

Seattle Mariners president of baseball operations Jerry Dipoto says the organization will look outside the franchise for its next manager. Dipoto confirmed the decision following Seattle’s 2026 season, saying the Mariners need a different perspective as they begin searching for a replacement for Dan Wilson.

Seattle Mariners News / EssentiallySports / September 29

Mariners’ Manager’s Exit Triggers Major Shake-Up After Disastrous 2026 Collapse

In 2025, the Seattle Mariners were just one game away from making it to the World Series but lost in the ALCS. That gave fans some hope for 2026, but all that came crashing down as they finished with a 76-86 record, 8 games behind the last Wild Card spot, and ended the Dan Wilson Era.

Seattle Mariners News / Larry Brown Sports / September 28

Mariners move on from 4 more coaches after Dan Wilson decision

The Seattle Mariners missed the playoffs in 2026 despite making the ALCS a year ago, and they decided to relieve manager Dan Wilson of his duties after the final game of the regular season.

Dan Wilson News / Field Level Media / September 27

Mariners manager Dan Wilson out after disappointing 2026 campaign

The Seattle Mariners announced shortly after Sunday's season finale that manager Dan Wilson will not return in 2027. Seattle was a disappointing 76-86 this season, finished third in the American League West and missed the playoffs one year after advancing to Game 7 of the 2025 ALCS before falling to the Toronto Blue Jays.

Seattle Mariners News / Larry Brown Sports / September 27

Top Mariners prospect leaves game after getting hit by 104-mph comebacker

Seattle Mariners fans held their collective breath as Kade Anderson left Saturday’s game with an injury. The Mariners’ No. 1 prospect left the mound early against the Los Angeles Angels after getting hit by a 103.8-mph comebacker in the 4th inning at T-Mobile Park in Seattle, Wash.