The Seattle Mariners entered August 18, 2026 with a 58-66 record — a long way from the AL West contenders everyone expected in April. ESPN’s Jesse Rogers didn’t sugarcoat it: a major roster overhaul is coming this offseason, driven by both a lack of production and reported chemistry issues inside the clubhouse.
Jerry Dipoto, Seattle’s president of baseball operations and one of the most active roster-movers in the game, has plenty of reasons to get busy. Rogers put it plainly on August 17: «You know Jerry Dipoto, he’ll trade just if it’s a Tuesday. He will shake things up this offseason. Between the chemistry and lack of production there’s going to be a lot of changes.»
The Tuesday line isn’t a throwaway joke. Dipoto has a well-documented track record of preferring trades over free agency, and he rarely needs much of an excuse to pull the trigger. Hand him a season like this one and the offseason gets genuinely interesting.
The Collapse Nobody Had on Their Bingo Card
To understand where the Mariners are, start with their catcher. In 2025, Cal Raleigh hit 60 home runs — the ninth-highest single-season total in MLB history, an all-time record for catchers and switch-hitters — posting an OPS+ of 168, meaning he was 68% better than the average big-league hitter. In 2026, that OPS+ sits at 65.
That’s a 103-point drop in a single year for a 29-year-old who should be in his prime — one of the steepest one-year declines in recent MLB history at that position. Raleigh isn’t the only reason Seattle is where it is, but he is the clearest symbol of everything that went wrong.
The team-wide numbers back it up. Seattle ranked 28th in MLB in OPS against left-handed pitching in 2026, down from 12th in that same category the year before. This wasn’t a bad week. It was a two-month trend that Dipoto himself publicly called «abysmal» — and that led him to replace hitting coach Bobby Magallanes with Ed Paparella mid-season.
What Dipoto Already Did — and What’s Coming
At the August 1 trade deadline, the Mariners made some moves. They designated catcher Mitch Garver and outfielder Rob Refsnyder for assignment, and activated reliever Seranthony Domínguez (4-3, 3.99 ERA in 43 games) and outfielder Taylor Ward (.246 AVG, 7 HR, AL-leading 87 walks). Real moves — just not enough to change the season’s story.
What Rogers is pointing to goes well beyond the deadline. A full offseason with Dipoto at the wheel, a roster that underdelivered, internal tensions reported by local outlets, and Josh Naylor’s five-year, $92.5 million contract — the largest ever given to a position player in the Dipoto era — all hanging over a front office that bet big and came up short.
One thing worth clarifying: Rogers is talking about roster changes, not front-office changes. There are no reports putting Dipoto’s job or manager Dan Wilson’s seat in jeopardy. What’s coming is a player-level rebuild — not a power-structure shakeup.
- Mariners record as of August 18, 2026: 58-66
- Cal Raleigh OPS+ in 2025: 168 | In 2026: 65 (–103 points)
- Team OPS vs. LHP rank: 28th in 2026, down from 12th in 2025
- Josh Naylor’s contract: 5 years, $92.5 million
