PEORIA, Ariz. -- The longest home run of Spring Training across all of Major League Baseball belongs to a Mariners hitter who has more pop than you’d think. Not Cal Raleigh. Not Julio Rodríguez. Not even Randy Arozarena or Josh Naylor.

PEORIA, Ariz. -- Giddyup, Ryan Sloan. The Mariners’ overpowering right-hander lived up to his lofty prospect pedigree when overwhelming a lineup featuring MLB Pipeline’s No. 1-ranked farm system on Friday afternoon at MLB Spring Breakout. His final line: Nine up, nine down, 39 pitches, three strikeouts -- and no mercy.

This story was excerpted from Daniel Kramer’s Mariners Beat newsletter. To read the full newsletter, click here. And subscribe to get it regularly in your inbox.

The Mariners are returning to T-Mobile Park for the first time since the American League Championship Series, a venue that saw some of the postseason’s most iconic moments of 2025, while the Guardians will look to springboard their surging finish to last October, when they came out of nowhere to

PEORIA, Ariz. -- After much success in its first two years, Spring Breakout is back in 2026, creating a showcase-type opportunity for the best and brightest faces of the future by pitting them against other prominent prospects from other organizations. And for the Mariners, who possess one of the sport’s

PEORIA, Ariz. -- At long last, Mariners manager Dan Wilson was finally ready to reveal the club’s Opening Day starter on Thursday afternoon. And to little surprise, given how Seattle had slotted its rotation throughout Cactus League play -- and that its selection is a homegrown ace who’s blossomed into

We are about one week away from Opening Day, and the final rosters are starting to take shape. So we asked the MLB.com beat writers who cover the American League West clubs about what they’ve seen in camp to this point.

PEORIA, Ariz. -- The cat content was in peak form at the World Baseball Classic. Andrés Muñoz regularly shared updates of his 15-year-old Persian feline, Matilda, from his hotel room in Houston while competing for Team Mexico -- headlined by the furry friend donning a mini sombrero in support.

PEORIA, Ariz. -- It’s becoming increasingly clear that the Mariners will need a No. 5 starter when they break camp and voyage to Seattle for Opening Day. And how they handle that spot -- as Bryce Miller works back from left oblique inflammation -- has all of a sudden become

PEORIA, Ariz. -- For Kade Anderson, Friday night was about the finish. The Mariners’ wunderkind left-hander made what wound up being his final start of an impressive Cactus League slate, covering three innings in a 10-7 loss to the Dodgers and working through a mid-game adjustment that helped salvage the

PEORIA, Ariz. -- Randy Arozarena returned to Mariners camp on Saturday morning ready to turn the page towards the regular season. He also preferred not speaking further on the exchange with Cal Raleigh at the World Baseball Classic, declining interview requests at the Peoria Sports Complex and instead issuing a

PEORIA, Ariz. -- By now, virtually everyone following the sport has seen the clips, heard the player reactions -- and more so, had a take -- on the awkward exchange between Cal Raleigh and Randy Arozarena at the World Baseball Classic on Monday night. The not-so-ideal part for the Mariners

PEORIA, Ariz. -- It won’t quite be show-and-go for the Mariners’ eight players at the World Baseball Classic who are expected to be on the club’s Opening Day roster. But it will still be a tight turnaround by the time they all return for the final days of Spring Training

PEORIA, Ariz. -- Bryce Miller’s first full-effort bullpen session since suffering left side oblique inflammation was cut short before it got going on Wednesday afternoon, making an already tight window to break camp on the Opening Day roster even tighter. Miller threw a handful of higher-intensity warmup pitches, then took

PEORIA, Ariz. -- If there was any drama brewing between Cal Raleigh and Randy Arozarena at the World Baseball Classic, last year's AL MVP runner-up took steps to defuse it on Tuesday afternoon. "I hate that this is a thing,” Raleigh said via FaceTime with three Mariners beat reporters. “I

This story was excerpted from Daniel Kramer’s Mariners Beat newsletter. To read the full newsletter, click here. And subscribe to get it regularly in your inbox.

MARYVALE, Ariz. -- You had to really be paying attention to see it, and even then, peering closely. You also had to be there, because the game wasn’t televised. On Sunday, it might’ve looked like George Kirby was adjusting his belt throughout his second Cactus League start vs. the Brewers.

PEORIA, Ariz. -- Still too early to talk Opening Day starter in Mariners camp? For manager Dan Wilson, who for the second straight year doesn’t have the most obvious choice, that’s a yes.

PEORIA, Ariz. -- Bryce Miller was in the middle of discussing his first mound session in 10 days when Justin Hollander passed by. “He’s fine!” the Mariners' general manager shouted good-naturedly.

PEORIA, Ariz. -- For a Mariners lineup that for the first time in years lacks notable voids, there might not be a player who can elevate the group’s 2026 floor more than Cole Young. Sound lofty for a 22-year-old entering his first full season? Maybe. But does that assertion come

SURPRISE, Ariz. -- The Mariners sure seem like they grow homegrown starting pitchers on trees, and Kade Anderson is quickly becoming the latest branch to grow. The No. 3 overall pick in last year’s MLB Draft was at it again in Friday afternoon’s 5-1 win against the Rangers -- in

This story was excerpted from Daniel Kramer’s Mariners Beat newsletter. To read the full newsletter, click here. And subscribe to get it regularly in your inbox.

Baseball against the backdrop of one of the most beautiful summer regions in the country has made T-Mobile Park a top-tier coveted stop among the 30 ballparks across MLB. Nestled in the SoDo neighborhood just south of downtown Seattle, the home of the Mariners opened in July of 1999. But

PEORIA, Ariz. -- The Mariners have made quite a few subtractions in volume to their prospect pool over the past 12 months, notably as chips for their bolder trades to bolster the Major League roster.

PEORIA, Ariz. -- Kade Anderson was already pacing towards the dugout before the umpire’s call. No automated ball-strike system needed; he knew he’d dotted the outer half for strike three. No fear pitching against established big leaguers for the first time. No doubt in his belonging on this stage.