Seattle Mariners News

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Luis Castillo • SP • Mariners |

Bryce Miller • SP • Mariners

Mariners Intend to Piggyback Luis Castillo, Bryce Miller

Seattle Mariners starting pitchers Luis Castillo and Bryce Miller will piggyback each other after a full turn through the rotation. Miller is set to return from the Injured List on Wednesday after missing the start of the season due to an oblique issue. The Mariners plan to use a six-man rotation for one full turn through, but will shake it up after that. The Mariners don't want to disrespect Castillo, who has been a starter throughout his big league career. However, Castillo has been horrible with a 6.29 ERA through seven starts this season. The hope is that putting Castillo and Miller together will end up offering better results for both pitchers. Between the two, Miller is the more desirable fantasy option, but he won't be an ideal streaming choice if he doesn't pitch deep into games.

18 hours ago

Bryce Miller • SP • Mariners

Bryce Miller is Set to Return on Wednesday

Seattle Mariners starting pitcher Bryce Miller (oblique) is set to return from the 15-day Injured List on Wednesday. Miller has been sidelined since the beginning of the season due to a left oblique strain. After making four rehab starts, Miller is ready to return to the big league mound. Miller is scheduled to take the ball against the Houston Astros on Wednesday. He should be worth a look as a waiver wire addition for fantasy managers seeking pitching help. The Mariners will go with a six-man rotation for now, so no one will be booted yet.

21 hours ago

Cole Young • 2B • Mariners

Cole Young is Emerging as Waiver-Wire Target

Seattle Mariners second baseman Cole Young is off to an impressive start to the 2026 season. Young got a taste of the MLB last year, but struggled to find much consistency at the plate. This season has gone much better for Young at this dish so far. Through 38 games, Young is slashing .276/.342/.403 with three home runs, 20 RBI, and 12 walks. Over the last two weeks, Young has collected 16 hits with nine RBI, which ranked him in the top 100 value over the span. Fantasy managers who are seeking a bat in deep leagues should consider adding Young. He does a little bit of everything, which can help fantasy managers in category formats.

Yesterday

Luis Castillo • SP • Mariners

Luis Castillo Could be Bumped From Starting Rotation

Seattle Mariners starting pitcher Luis Castillo could end up as the odd man out in the starting rotation. Fellow starter Bryce Miller (oblique) is set to return from the Injured List next week. The Mariners will need to make a big decision with their rotation once Miller is back in the mix. They could roll with a six-man rotation; if not, Castillo or Emerson Hancock would likely be shifted to a bullpen role for now. Castillo has never pitched out of the bullpen, with all 250 of his big league appearances coming as starts. However, he has been unusable in the rotation this season. Castillo owns a 6.29 ERA, 1.66 WHIP, and a 31:13 K:BB ratio through seven starts. Hancock has been the much more effective starter and has earned the right to remain in the rotation. A short stint in the bullpen might be good for Castillo to hopefully turn around his season.

2 days ago

Luis Castillo • SP • Mariners |

Emerson Hancock • SP • Mariners

Luis Castillo, Emerson Hancock in Danger of Moving to Bullpen?

With Seattle Mariners right-hander Bryce Miller (oblique) on the verge of being reinstated from the 15-day injured list to make his 2026 season debut at some point next week, one of right-handers Luis Castillo or Emerson Hancock, could be in danger of being bumped from the starting rotation to the bullpen, according to Adam Jude of The Seattle Times. The Mariners could also elect to go with a six-man rotation for the time being. Jude writes that one thing is certain: Hancock has cemented a place on the major-league roster. He's been one of the best starters in the American League so far this year, posting a team-best 2.59 ERA and 46:6 K:BB in 41 2/3 innings pitched. Another possibility is that Castillo is paired with Miller in a piggyback role. The 33-year-old Castillo is most in danger of a demotion to a relief role after starting 2026 0-3 with an ugly 6.29 ERA in seven starts. It's easier said than done, though, as he's never pitched out of the bullpen and is a respected leader in the clubhouse. Castillo is also still owed $24 million next year with a vesting option for the 2028 season.

2 days ago

Brendan Donovan • 3B • Mariners

Brendan Donovan to Come Off the Injured List on Friday

Seattle Mariners infielder Brendan Donovan (groin) will be activated from the 10-day injured list before Friday's contest in Chicago against the White Sox, according to Aadm Jude of The Seattle Times. Fantasy managers will be ready to get Donovan back into their starting lineups for the start of the Mariners' series on Friday in Chicago after he missed around three weeks with a groin injury. The 29-year-old German native could have to manage the injury going forward, but for now, he's ready to go and will return to a strong .304/.437/.518 slash line, .954 OPS, three home runs, eight RBI, seven runs scored, and a stolen base in his first 18 games with the organization. Donovan was a first-time All-Star in 2025 in his final season with the St. Louis Cardinals, when he hit .287 (132-for-460) with 10 long balls, 50 RBI, 64 runs, and three steals in 118 games played. He's primarily useful for his defensive versatility in fantasy -- he's eligible at second, third, shortstop, and the outfield -- but has a low ceiling because of his modest power and speed. Donovan has never had more than 14 homers, 73 RBI, or five steals in his four MLB campaigns.

2 days ago

Kade Anderson • SP • Mariners

Kade Anderson on Fast Track to MLB Debut?

Seattle Mariners starting pitching prospect Kade Anderson could be on a fast track to making his MLB debut. Typically, college pitchers are the quickest to make their MLB debut -- faster than college hitters, and faster than all prep players in general. Not only was Anderson drafted out of college last summer, but he also has elite draft capital as a former No. 3 overall pick. Furthermore, he's also pitching incredibly well this season, maintaining a 0.37 ERA and 1.13 FIP with 14.05 K/9, 1.48 BB/9, and a 46.7% ground ball rate. He hasn't allowed a home run yet, either. We'd be a bit surprised to see Anderson jump straight from Double-A to MLB, so there's still a little time before he makes his debut. However, fantasy managers shouldn't wait. Stashing Anderson now is the right move, because we do expect to see him in the majors this year, and he has the potential to rack up strikeouts, limit walks and home runs, and pitch deep into games for the Mariners. He currently ranks #11 among starting pitching prospects in RotoBaller's latest dynasty fantasy baseball rankings.

3 days ago

Bryce Miller • SP • Mariners

Bryce Miller Could Make Season Debut Next Week

The Seattle Mariners are leaning toward activating right-hander Bryce Miller (oblique) from the 15-day injured list on their upcoming road trip, which begins on Friday in Chicago against the White Sox, a club source told Adam Jude of The Seattle Times. Miller is scheduled to join the team in Chicago to check in with coaches and trainers. If he's cleared, the 27-year-old could rejoin Seattle's starting rotation to make his 2026 season debut in the middle of next week in Houston against the division-rival Astros. Miller threw five shutout innings on Wednesday with High-A Everett in what he hopes will be his final minor-league rehab start. "I'm ready to go," Miller said. He's been on the 15-day injured list all season to this point, but he's worth a look on the waiver wire for fantasy managers seeking rotation help. Miller is currently rostered in only 29% of Yahoo leagues and is hoping to regain his 2024 form, when he had a 2.94 ERA, 0.98 WHIP, and 171:45 K:BB in 31 starts, after an injury-plagued 2025 campaign.

3 days ago

Colt Emerson • SS • Mariners

Colt Emerson Homers Wednesday, Getting Closer to MLB Debut?

Seattle Mariners shortstop prospect Colt Emerson went 3-for-5 with two singles, one home run, and three RBI during a Triple-A game on Wednesday. It's been a relatively modest year at the plate for Emerson, who is slashing .241/.336/.463 with five homers, seven steals, and a 100 wRC+. Still, he represents the future in Seattle, especially after signing an eight-year extension earlier this spring. Because of that enormous contractual commitment, the Mariners may feel incentivized to call him up for his MLB debut sooner rather than later. Even though the numbers at the plate haven't been amazing, his performance on Wednesday -- coupled with above-average defense all year long -- could be enough to move the needle within the Mariners' front office. J.P. Crawford has shortstop locked down, but Emerson could presumably play a healthy dose of games at second or third base in the majors. Because he's getting closer to his MLB debut, managers should strongly consider stashing Emerson in fantasy baseball.

3 days ago

Cole Young • 2B • Mariners

Cole Young Emerging as a Breakout Second Baseman to Target on the Waiver Wire

After struggling to a .607 OPS across his first 257 MLB plate appearances in 2025, Seattle Mariners second baseman Cole Young appears to have turned a corner in his sophomore campaign. Across 149 plate appearances in 2026, the 22-year-old is hitting .276/.342/.403 with three home runs, 20 RBI, 20 runs scored, and two stolen bases. Young has raised his barrel rate from 5.6% to 8.1%, and his hard-hit rate from 31.3% to 41.4%. The lefty-swinging Young has also more than held his own against same-handed pitching, hitting .283/.306/.478 against southpaws. Young's batting average could be at risk of regression, as his strikeout rate is up from 18.3% in 2025 to 24.2% in 2026. He's also currently benefiting from an elevated.354 batting average on balls in play. Still, Young has taken over as the unquestioned everyday second baseman in Seattle and offers a well-rounded profile that makes him an appealing waiver wire target for fantasy managers.

3 days ago

Brendan Donovan • 3B • Mariners

Brendan Donovan to Start a Rehab Assignment on Tuesday

Seattle Mariners infielder Brendan Donovan (groin) isn't expected to be activated on the team's six-game homestand, but he will take part in a two-game minor-league rehab assignment at Double-A Arkansas, beginning on Tuesday, according to Daniel Kramer of MLB.com. If that goes well, Donovan will be activated on Friday, May 8, in Chicago to face the White Sox. He went through an extensive pre-game workout that included agility, fielding, and hitting drills last Friday. Donovan suggested that his groin issue will need to be monitored long-term, and it's likely related to the sports-hernia surgery he had last October. The 29-year-old German native didn't exactly look limited offensively in his first 56 at-bats with the Mariners before landing on the 10-day injured list, as he was hitting .304 (17-for-56) with three homers, eight RBI, seven runs scored, and a stolen base in 18 games played. Donovan doesn't provide much power or speed, but he's useful for his elite contact skills and counting stats in a strong Mariners lineup when he's healthy.

5 days ago

Cal Raleigh • C • Mariners

Cal Raleigh Still Out With Side Tightness Against Braves

Seattle Mariners catcher Cal Raleigh (side) continues to sit out of Monday's series opener against the Atlanta Braves due to right-side tightness, according to MLB.com. Mitch Garver will do the catching for right-hander Logan Gilbert and will bat eighth for the M's against right-handed rookie JR Ritchie in the first game of the series in Seattle. Raleigh complained of side tightness on Friday and was scratched from the lineup against the Kansas City Royals on Saturday. The 29-year-old left-handed slugger also sat out of Sunday's series finale. The Mariners were concerned enough to send Raleigh for an MRI exam, but he said on Sunday that he's feeling better. We can't rule out an injured-list stint for the All-Star catcher yet, but for now, consider him to be day-to-day. Raleigh was a first-time All-Star in 2025, when he led the league in home runs (60) and RBI (125). He has homered seven times already in 33 games this year, but he's also struggled to a .186 average (24-for-129) with 16 walks and 43 strikeouts across 147 plate appearances. Check back on Tuesday to see if Raleigh can return to the starting nine in Seattle.

5 days ago

Kade Anderson • SP • Mariners

Kade Anderson Turns in Another Stellar Outing, Can he Debut in 2026?

Seattle Mariners left-handed pitching prospect Kade Anderson turned in another stellar outing at Double-A and is making a strong case to make his MLB debut much sooner than previously expected. Anderson joined the Mariners with the third overall selection in last spring's draft but has quickly proven himself more than capable of holding his own at Double-A. On May 1, Anderson logged 5 2/2 shutout frames against Wichita with four hits, no walks, and eight strikeouts. Overall, across Anderson's first 24 1/3 professional innings (all with Double-A), Anderson has allowed just one run with 13 hits, and an incredible 38:4 K:BB. Currently, the Mariners do not have a clear opening for him, as Emerson Hancock has fully claimed the No. 5 role, and Bryce Miller (oblique) is on rehab assignment. While he may not debut in the second half, the former LSU star is on track to debut later this season and is worth stashing in all 12+ team leagues in an "NA" spot.

6 days ago

Colt Emerson • SS • Mariners

Colt Emerson on the Verge of MLB Debut?

Seattle Mariners shortstop prospect Colt Emerson continues to find success at the top level of the Seattle system and remains a high-end hitting prospect to stash in all formats. Over the last seven games at Triple-A Tacoma, Emerson has gone deep twice while swiping one bag with a 12:5 K:BB. Overall, the team's No. 1-ranked prospect has held a .234/.342/.547 slash line with seven doubles, four home runs, and seven stolen bases. Last summer, the former 22nd-overall selection spent time in the lower levels of the Seattle system and remains just one step away from joining the MLB roster. Even though there is no clear spot on the MLB roster for Emerson, as Cole Young has held his own at the keystone and veteran J.P. Crawford remains the primary shortstop, Emerson remains the top candidate to earn the call following a major injury.

6 days ago

Cal Raleigh • C • Mariners

Cal Raleigh Considered Day-to-Day With Soreness in his Side

Seattle Mariners manager Dan Wilson said that catcher Cal Raleigh (side) is considered day-to-day while he battles soreness in his side, per Daniel Kramer of MLB.com. Kramer also reports that Raleigh is planning to go through pre-game drills on Sunday after he was scratched from the Mariners' lineup on Saturday. Coming off his 60-homer campaign in 2025, Raleigh is off to a bit of a slow start in 2026. Across 147 plate appearances, the 29-year-old is hitting .182/.272/.380 with seven home runs, 18 RBI, 13 runs scored, and two stolen bases. Raleigh's hard-hit rate is down from 49.6% to 30.7%, while his strikeout rate has risen from 26.7% to 29.3%. Still, the switch-hitting catcher owns an above-average 13.6% barrel rate and remains one of the most dangerous power hitters in baseball. It appears that Raleigh has a chance to avoid the injured list, although more information may be available later today. Mitch Garver started behind the plate and batted eighth in Raleigh's absence on Saturday.

7 days ago

Cal Raleigh • C • Mariners

Cal Raleigh Dealing with General Soreness, Required Imaging

Seattle Mariners catcher Cal Raleigh (soreness) was scratched ahead of Saturday's game against the Kansas City Royals. The team has been vague about the injury and is calling it general soreness. Raleigh did need to undergo imaging, so this might be something that requires a stint on the Injured List. Mitch Garver drew the start behind the plate on Saturday. He figures to see the bulk of the playing time at catcher if Raleigh does miss time. Fantasy managers will need to check back for another update on his status.

7 days ago

Cal Raleigh • C • Mariners

Cal Raleigh Scratched From Lineup, No Reason Given

Seattle Mariners catcher Cal Raleigh (undisclosed) was scratched from the starting lineup prior to the first pitch of Saturday's game against the Kansas City Royals. Raleigh had been slated to bat second, and he was replaced by catcher Mitch Garver, who hit eighth. The Mariners didn't provide a reason for Raleigh's absence, but it could be injury-related. After all, the team promoted catcher Jhonny Pereda on Saturday. With Garver already on the roster, it seems unlikely that the Mariners would need Pereda on the 26-man roster if Raleigh were healthy enough to play. Fans and fantasy managers will hope to receive additional updates from the team on Saturday night or Sunday morning. It's been a rough start to the year for last year's AL MVP runner-up. He has seven homers through 33 games, but he's slashing just .186/.272/.380 with 86 wRC+ and a 29.3% strikeout rate. For now, the 29-year-old still ranks #1 among catchers in RotoBaller's latest 2026 fantasy baseball rankings.

7 days ago

Julio Rodríguez • CF • Mariners

Julio Rodriguez Clubs Two Homers in Loss to Royals

Seattle Mariners outfielder Julio Rodriguez was at his best on Friday night in the team's 7-6 loss to the visiting Kansas City Royals at T-Mobile Park. Rodriguez went 2-for-4 at the plate out of the three-hole with two home runs, four RBI, and two strikeouts. The 25-year-old hit two two-run home runs in the contest to double his home run total on the season. J-Rod is beginning to heat up for his fantasy managers, as he now has six multi-hit performances in his last 10 games, including three of his four long balls on the season. He's now batting .262/.333/.400 with a .733 OPS, 16 RBI, 16 runs scored, and three stolen bases in 33 games played in 2026. It's nice to see Rodriguez, who has become known as a slow starter, have a game like this now that the calendar has flipped to May. His fantasy managers will be hoping the hot hitting continues to close out the series this weekend in Seattle against KC.

May 2

Matt Brash • RP • Mariners

Mariners Place Matt Brash on Injured List With Lat Inflammation

The Seattle Mariners announced on Friday that they placed right-handed reliever Matt Brash (lat) on the 15-day injured list (retroactive to April 30) with right-lat inflammation and recalled left-hander Josh Simpson from Triple-A Tacoma in a corresponding move. Brash injured himself during his brief outing against the Minnesota Twins on Wednesday when he threw just two pitches in the eighth inning. He has escaped any structural damage, but he'll now miss at least the next two weeks and possibly more. Although Brash isn't Seattle's closer, he's a key late-inning, high-leverage piece for the M's, so this is a big loss. The 27-year-old Canadian hurler has not allowed an earned run so far in 2026, with eight strikeouts in 11 1/3 scoreless innings. Brash is only rostered in 10% of Yahoo leagues because he's merely a setup man, but when healthy, he's attractive in fantasy leagues that reward points for holds. With Brash out for at least 15 days, look for Jose A. Ferrer and Eduard Bazardo to take on bigger setup roles late in games in front of closer Andres Munoz.

May 1

Matt Brash • RP • Mariners

Matt Brash Diagnosed With Lat Inflammation, Could Land on IL

Seattle Mariners right-handed reliever Matt Brash (lat) had an MRI exam that showed "trace inflammation" in his right lat, president of baseball operations Justin Hollander told MLB.com's Daniel Kramer. There were no signs of structural damage for Brash. The Mariners are now trying to determine if he'll need to go on the 15-day injured list. Brash was pulled on Wednesday against the Minnesota Twins after throwing just two pitches. The 27-year-old Canadian could need to rest his lat for several weeks, which would be a big blow to Seattle's bullpen. Brash isn't the team's closer (that's Andres Munoz), but he's been excellent in a late-inning setup role and is a fine source of holds. Through his first 11 1/3 innings of 2026, Brash has yet to allow a run while picking up two wins and striking out eight in 14 appearances. If anything were to happen to Munoz, Brash would also be the clear favorite for saves in Seattle. He's currently rostered in 11% of Yahoo leagues.

May 1

Seattle Mariners News

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