The Mariners’ offense finally awoke in a 9-2 rout of the Oakland Athletics on Monday night, May 25, 2026, at Sahlen Field in West Sacramento, California. The victory marked Seattle’s first series win of the month and provided a much-needed boost to their 2026 postseason hopes after a dismal April. The Mariners entered the game with a 23-28 record, tied for third place in the AL West with the Los Angeles Angels, but just 2.5 games behind division-leading Houston. This win improved their record to 24-28 and put them in sole possession of the third seed in the division, a critical position given the wild-card race heating up behind them.
The Mariners’ bats, long dormant this season, erupted for six runs in the third inning alone, with left-handed hitters—long a liability—finally exploiting Athletics starter Aaron Civale’s overreliance on his cutter. The Mariners had hit just .224 as a team against left-handed pitching in 2026, but against Civale, they were batting .312 entering Monday’s game. The offensive explosion came after Seattle had scored just 18 runs in their previous five games, a stretch that saw them drop two of three to the Angels and Houston. The win also marked the first time this season the Mariners had scored six or more runs in a single inning.
Game Context: A Critical Moment in the AL West Race
The Mariners’ victory came in the second game of a three-game series against the Athletics, who entered the game with a 26-27 record and a 1.5-game lead over Seattle in the AL West standings. The series was pivotal for both teams, with Oakland needing to maintain momentum to stay within striking distance of the Astros, while Seattle was desperate to climb back into contention. The Mariners had lost four of their last five games entering Monday’s contest, including a heartbreaking 1-0 defeat to the Angels on May 22 that dropped them into a tie for third place.
Sahlen Field, the Athletics’ home stadium, had been a tough venue for the Mariners this season, with Seattle posting a 3-7 record in their last 10 games there. However, the Mariners’ bullpen had been dominant in recent weeks, allowing just one earned run in their last six appearances, a key factor in their ability to overcome the rotation’s struggles.
Castillo’s Frustration: The Human Cost of the Piggyback Experiment
Luis Castillo, a 33-year-old veteran with 76 career starts, was pulled after a strong performance—68 pitches, two hits allowed, six strikeouts—in the sixth inning during the 9-2 win over the Athletics. His reaction was visceral: slamming his glove into the dugout bench after a heated exchange with manager Dan Wilson. The moment captured the emotional strain of Seattle’s untested “piggyback” rotation strategy, where Castillo and Bryce Miller, both former starters, alternate roles mid-game. Castillo had started the game and was pulled in favor of Miller, who entered in relief in the seventh inning.
“I was kind of asking, ‘Maybe one more inning?’ He told me that Bryce was ready. But as a competitor, you kind of want to go out there and just continue. But at the same time, you’ve got to respect his position.”
—Luis Castillo, via MLB.com
The tension stems from Seattle’s desperate bid to stabilize its rotation after a disastrous 2025 season, when the Mariners finished 68-94, last in the AL West. This year, the team has been experimenting with the “piggyback” system, where Castillo and Miller—both former starters—alternate roles mid-game, with one pitching deep into the game while the other takes over in relief. The strategy has seen both pitchers pulled after strong outings, testing the limits of their patience and raising questions about their long-term roles.
Castillo, who had been the Mariners’ most reliable starter early in the season, had allowed just two earned runs in his first 12 starts before the experiment began. His ERA had ballooned to 5.12 since the rotation changes were implemented, and he had been pulled from two of his last three starts, including a no-decision in a 10-3 loss to the Angels on May 20.
The Piggyback System: A Gamble with No Guarantees
This wasn’t the first time the system backfired. Just three days earlier, on May 22, Miller—who had been the starter—was pulled after 5 2/3 innings in another no-hitter threat, only to see Castillo take over in relief. The flip-flop left both pitchers confused about their roles and frustrated by the lack of clarity. The Mariners had won that game 10-3, but the rotation’s instability had become a growing concern.
“And I think, always, you’re kind of weighing a lot of different things. And a tough decision in terms of ‘The Rock,’ and I think he just continues to prove to be an incredibly selfless player.”
—Dan Wilson, Mariners manager, via MLB.com
Wilson, in a post-game press conference, acknowledged the challenges of the system but defended the approach, citing the need to preserve both pitchers’ arms in a high-stakes pennant race.
“We’re in a situation where we need both of these guys to be healthy and effective for the long haul,” Wilson said. “The piggyback system is about managing their workloads and giving them both opportunities to contribute in ways that keep them fresh. It’s not easy, but it’s a necessary evil right now.”
Miller, who had never pitched in relief since college, was thrust into the role with little warning. “I found out yesterday or two days ago,” he said, describing the scramble to adapt. “Like, I haven’t done this in a while—really, since college.” His first relief appearance came after Castillo’s early exit on May 22, and though he held Seattle to a 9-2 lead in Monday’s game, the experiment’s unpredictability left both pitchers questioning their long-term roles.
Miller’s ERA had surged to 6.75 since the rotation changes, and he had allowed five earned runs in his last two starts. However, his performance in relief had been solid, allowing just one run in his two appearances. The Mariners’ bullpen coach, Mark Johnson, had been working with Miller on a relief-specific pitch mix, but the transition had been abrupt and unsettling for both pitchers.
Offense Finally Finds Its Footing—But for How Long?
While the rotation’s drama played out, Seattle’s offense—long a source of frustration—delivered its most dominant performance of the year. The Mariners scored six runs in the third inning alone, with left-handed hitters (a perennial weakness) finally exploiting Athletics starter Aaron Civale’s overreliance on his cutter. The Mariners had hit just .224 as a team against left-handed pitching in 2026, but against Civale, they were batting .312 entering Monday’s game.
Colt Emerson, who had been struggling with consistency, delivered a clutch two-run homer in the third inning, his first multi-run blast since April 15. Julio Rodríguez, Seattle’s reigning AL MVP candidate, drove in two runs with a single and a sacrifice fly, while Josh Naylor and Randy Arozarena combined for two more runs, including Arozarena’s two-run double that capitalized on a defensive miscue by the A’s first baseman, Matt Olson.
Luke Raley, who had been battling a hamstring strain that had limited him to just 12 games this season, delivered a clutch two-run homer in the fifth inning, his first home run since May 10. Raley’s return to form had been a key factor in the Mariners’ recent offensive resurgence, and his performance in Monday’s game had reignited speculation about his long-term availability.
Dom Canzone’s go-ahead shot in the third sealed the 9-2 victory, his first home run since May 18. Canzone, who had been struggling with a lack of consistency, had hit just .213 in May before Monday’s game. His performance had been a rare bright spot in a season where Seattle’s offense had been erratic at best.
The Mariners’ lefty lineup, which had been hitting near .300 against Civale all season, finally turned that into runs—a rare bright spot in a season where Seattle’s offense had been erratic at best. The win also marked the first time this season the Mariners had scored six or more runs in a single inning, a development that had raised hopes for a late-season offensive surge.
Injury Context: Raley’s Return and the Mariners’ Depth Chart
Luke Raley’s return to form had been a critical development for the Mariners, who had been struggling with depth at first base and in the outfield. Raley, who had been dealing with a hamstring strain since early May, had been limited to just 12 games this season. His injury had forced Seattle to rely on Dom Canzone and Julio Rodríguez at first base, two players who had been struggling with consistency.
Raley’s hamstring strain had been diagnosed as a Grade 1 pull, and he had been cleared to return to action on May 18. However, his performance had been inconsistent in his first five games back, with just one extra-base hit in that span. Monday’s game marked his first multi-run performance since his return, and his hamstring had felt “100 percent” after the game, according to team sources.
The Mariners’ next game is scheduled for Wednesday, May 27, at home against the Athletics, with the series finale set for Thursday. Seattle’s bullpen, which had been dominant in recent weeks, will be crucial in maintaining momentum, especially if the rotation continues to struggle with consistency.
League Context: Playoff Race and Series Implications
The Mariners’ win improved their record to 24-28 and put them in sole possession of the third seed in the AL West, a critical position given the wild-card race heating up behind them. The Astros, who had a 3.5-game lead over Seattle entering Monday’s game, were in first place with a 30-23 record. The Angels, who had been in a tie for third with Seattle, dropped into a tie for fourth after their loss to the Mariners on May 22.
The AL West standings as of May 25, 2026:
- Houston Astros: 30-23 (.556), 3.5 games ahead
- Seattle Mariners: 23-28 (.451), 1.5 games behind
- Los Angeles Angels: 23-28 (.451), tied for third
- Oakland Athletics: 26-27 (.491), 1.5 games behind
The Mariners’ next series is a three-game set at home against the Athletics, starting Wednesday, May 27. If Seattle can win two of three, they will take sole possession of the third seed and move within striking distance of the Angels. The Angels, who have a slightly better record but a weaker schedule, are in a virtual tie with Seattle for the third seed.
The Mariners’ playoff hopes hinge on their ability to sustain their recent offensive resurgence while stabilizing their rotation. The team’s bullpen, which has been dominant in recent weeks, will be crucial in maintaining momentum. If the rotation continues to struggle with consistency, Seattle risks falling out of contention as the Astros and Angels extend their leads.
What’s Next for the Mariners’ Rotation—and Their Pennant Hopes?
The Mariners’ win was a much-needed confidence booster, but the rotation’s instability remains a major question mark. If Castillo and Miller continue to chafe under the piggyback system, Seattle risks losing two of its best arms to frustration—or worse, injury. The system’s success hinges on whether the pitchers can adapt to the mental and physical demands of switching roles mid-game, a challenge no MLB team has fully mastered.
Wilson has indicated that the piggyback system is not permanent and that the Mariners are evaluating other options, including a return to a traditional rotation or a hybrid approach that combines elements of the piggyback system with more traditional strategies. However, with the Mariners’ next series against the Athletics and a critical three-game set at home against the Angels scheduled for June 3-5, there is little time to experiment.
The Mariners’ next game is Wednesday, May 27, at home against the Athletics, with the series finale set for Thursday. Seattle’s bullpen, which had been dominant in recent weeks, will be crucial in maintaining momentum, especially if the rotation continues to struggle with consistency.
For now, the Mariners are clinging to a slim lead in the AL West, but their offense’s late-season resurgence—and their rotation’s ability to stay healthy—will determine whether Seattle can sustain a playoff push. The piggyback experiment is a high-risk, high-reward gamble, and the next few weeks will reveal whether it’s a stroke of genius or a costly distraction.
One thing is clear: the Mariners’ bats are finally waking up. Whether their rotation can keep pace remains the biggest question in Seattle’s 2026 season.
