Seattle Mariners: Breaking News, Rumors & Highlights

Mariners shake up rotation vs. White Sox, send Luis Castillo to bullpen

Luis Castillo hasn't pitched out of the bullpen in a regular-season game in his 10-year career. That's likely to change Tuesday night, when the Seattle Mariners plan to "piggyback" starter Bryce Miller and Castillo in the second game of a three-game series against the visiting Chicago White Sox.

Features

The Morning Bark

The Quiz of the Day

Checking in on the Top Mariner Prospects

Now nearly two months into the minor league season, the Mariners have had plenty of young farmhands show off their immense talent across the minor leagues.

Colt Emerson News / Yardbarker / May 19

Mariners rookie makes history with dramatic first career HR

Mariners rookie Colt Emerson makes history with dramatic first career HR

Emerson, whom the Mariners selected in the first round of the 2023 MLB Draft, now provides Seattle with another piece for both the present and the future.

Mariners to promote top prospect Colt Emerson

The 'Most home runs by a switch hitter' quiz

Seattle Mariners News / Lookout Landing / May 19

Mariners News: Colt Emerson, Bryan Woo, and Bryce Miller

Good morning! Last night’s Mariners win had just about everything: a first inning Julio homer, a wacky obstruction call in the third inning, a dominant Bryan Woo outing, and an incredible moment for Colt Emerson’s first major league hit in the form of a three-run home run.

Cal Raleigh News / Yardbarker Quizzes

The 'Active 40-HR MLB seasons' quiz

There are 24 active MLB players with at least one 40-home run season under their belt. How many of those players can you name in five minutes?

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

The 'American League MVPs' quiz

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

MLB News / Yardbarker

The 25 greatest rookie seasons in MLB history

Not every all-timer has instant success at the next level. For many baseball players, it takes a few bumps in the road out of the gate before they ever reach stardom.

Colt Emerson News / Minor League Baseball on SI / May 19

Mariners' Colt Emerson Produces Memorable Moment in Second MLB Game

Seattle Mariners infielder Colt Emerson ended his second game in the big leagues with an exclamation point. Emerson, MLB Pipeline's No. 6 overall prospect at this point in 2026, collected his first major league hit and home run on the same swing in Seattle's 6-1 victory over the Chicago White Sox on Monday.

Colt Emerson News / Lookout Landing / May 19

Colt Emerson hits first big-league homer in Mariners 6-1 win over White Sox

We have a running joke around these parts about how the Mariners and White Sox are incapable of playing a normal game with one another, but tonight’s game really stretched the bit thin.

Seattle Mariners News / Field Level Media / May 19

Julio Rodriguez homers as Mariners end skid, take down White Sox

Colt Emerson homered for his first major league hit, Julio Rodriguez also went deep and Bryan Woo pitched six scoreless innings as the Seattle Mariners defeated the visiting Chicago White Sox 6-1 Monday night to snap a three-game skid.

Luis Castillo News / Seattle Mariners on SI / May 18

Mariners May Have Just Pushed Luis Castillo to the Bullpen Without Saying It

The Mariners didn’t announce that Luis Castillo has been moved to the bullpen. But they may have just found the most roundabout way possible to put him there anyway.

Patrick Wisdom News / Seattle Mariners on SI / May 18

Mariners Make Another Power Play with Patrick Wisdom Back from Injured List

The Mariners’ latest roster shuffle says a lot about what they think their offense needs right now. Patrick Wisdom is back from the 10-day injured list,

Seattle Mariners News / MLB Trade Rumors / May 18

Mariners Recall Robinson Ortiz, Select Brennen Davis

The Mariners announced several roster moves today. Infielder Patrick Wisdom has been reinstated from the 10-day injured list and left-hander Robinson Ortiz has been recalled from Triple-A.

MLB News / Yardbarker

Which 20 players have hit four home runs in an MLB game?

The only two things rarer in modern-day baseball than the four-homer game is the Triple Crown and the unassisted triple play. The former is, of course, done over an entire season, while there's a large level of lucky in the unassisted triple play.

Colt Emerson News / Seattle Mariners on SI / May 18

Mariners Are Asking Colt Emerson To Grow Up Fast Without Calling It Pressure

He went from getting scratched at Triple-A Tacoma to starting at third base in Seattle’s lineup within hours, which is about as subtle as a fire alarm.

MLB News / Yardbarker / May 19

The six most disappointing MLB players this season

With the MLB season a touch over 25% of the way complete, slow starts are no longer being looked at as nothing to worry about. Sluggish starts are beginning to turn into season long concerns, especially for some stellar players.

Mariners rookie Colt Emerson makes history with dramatic first career HR

The 'Active 40-HR MLB seasons' quiz

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

The 'No. 2-scorers by NBA champion' quiz

The 'PGA Championship host courses' quiz

The 'Most 40-point games in a season' quiz

The 'Active 40-HR MLB seasons' quiz

Seattle Mariners News / Athlon Sports / May 18

J.P. Crawford Injury Update: Mariners' Dan Wilson Makes Announcement After Padres Game

The Seattle Mariners have been incredibly underwhelming in the 2026 MLB season. After coming just one win short of reaching the World Series in 2025, the organization has taken a clear step backward through two months of play.

Seattle Mariners News / Lookout Landing / May 18

Seattle Mariners Minor League Roundup – Week Eight

Tacoma managed to take the series by a score of 4-2 this week, besting Houston’s lackluster affiliate in Cheney Stadium. With a healthy amount of turmoil present within the major league roster, expect several of these Rainier players to be shuttling up to Seattle sooner than later.

Colt Emerson News / Just Baseball / May 18

Top Prospect Colt Emerson Debuts for Mariners

After placing third baseman Brendan Donovan on the 10-day injured list with a groin strain, the Seattle Mariners saw an opening for their top-ranked minor leaguer.

Seattle Mariners News / Lookout Landing / May 18

Mariners News: Colt Emerson, Brendan Donovan, and Jose Altuve

Good morning! The Mariners suffered another tough loss to the San Diego Padres last night and will be happy to put this edition of the Vedder Cup behind them.

Colt Emerson News / Field Level Media / May 18

Mariners counting on youngster Colt Emerson vs. White Sox

Shortly after 1 p.m. on Sunday, Colt Emerson was called into manager John Russell's office at Triple-A Tacoma. He was told not to sit down. Emerson, the Seattle Mariners' top prospect, was informed he needed to pack as quickly as possible because he was headed 40 miles north to Seattle for a nationally televised 4:20 p.m.

J.P. Crawford News / MLB on ClutchPoints / May 18

Mariners lose JP Crawford to injury during Padres series finale

Seattle Mariners shortstop JP Crawford exited Sunday’s 8-3 loss to the San Diego Padres after being struck by a 91.6 mph fastball from starter Lucas Giolito in the third inning.

MLB News / New Baseball Media / May 18

2026 Injury Report: Updates on Altuve, Crawford, Donovan

An injury-hampered Astros team will now have to contend with another loss, as Jose Altuve is headed to the injured list. The Mariners, meanwhile, saw one of their infielders land on the IL again on May 17, and another forced out the team’s contest against the San Diego Padres.

Seattle Mariners News / Yardbarker / May 17

Mariners to promote top prospect Colt Emerson

It was a matter of time before Seattle Mariners prospect Colt Emerson was promoted to the majors.

Padres go up early, improve to 5-0 this season against Mariners

Merrill Kelly goes distance for MLB rarity in Diamondbacks' win

Bryce Harper offers high praise of Pirates star Paul Skenes

Pirates' Ryan O'Hearn to miss time due to injury

Each MLB division leader's biggest weakness at the quarter point

The 'Active 40-HR MLB seasons' quiz

Brennen Davis News / MLB Trade Rumors / May 15

Brennen Davis Has Assignment Clause In Deal With Mariners

Outfielder Brennen Davis is with the Mariners on a minor league deal. As part of that deal, he has an assignment clause today, per Ryan Divish of The Seattle Times.

Seattle Mariners News / Fastball on SI / May 15

Mariners’ Rotation Now a Must-Watch Before 2026 Trade Deadline

If you're a Major League Baseball team in need of good pitching, the Seattle Mariners are the team that you should have your eyes on. The Mariners have boasted one of the best starting rotations in baseball for years at this point.

Seattle Mariners News / Larry Brown Sports / May 15

Mariners superstar lands on IL for first time in career

The Seattle Mariners placed catcher Cal Raleigh on the 10-day injured list Thursday with a right oblique strain, marking the first IL stint of his six-year major league career.

Seattle Mariners News / Just Baseball / May 14

What’s Going Wrong for Cal Raleigh?

This article was written prior to the news that Cal Raleigh will be going on the injured list with an oblique strain. After gradually developing and molding himself into one of the best catchers in the game, Cal Raleigh took his game to the next level during the 2025 campaign.

Seattle Mariners News / Larry Brown Sports / May 13

Cal Raleigh went to superstitious lengths to break his career-worst hitless streak

Cal Raleigh was willing to do whatever it took to finally get a hit, even if it meant having one of the strangest showers of his life before Tuesday’s game against the Houston Astros.