Mariners’ offense continues to struggle on first pitches, a problem that has followed Seattle all season

The Mariners’ offensive story this season has been complicated. On one hand, Seattle’s overall run creation has been close to league-average, and the team is finally getting closer to its full, healthy lineup on a regular basis for the first time this year. On the other hand, the Mariners have continued to run into a specific, repeatable problem at the very start of plate appearances: they have struggled with the first pitch.

According to Yahoo Sports, Seattle entered Saturday ranked 25th in Major League Baseball in runs per game, scoring 4.02 per night. That output projects to 651 runs over a full season, a pace that leaves the Mariners outside the group of teams that can consistently stack late innings and translate rallies into runs. The article frames the first-pitch issue as one of the most glaring contributors to why Seattle’s offense has not produced at a level closer to what fans saw in 2025.

There is also a clear context element for where the problem can be both amplified and masked. T-Mobile Park can suppress run environments compared with more hitter-friendly settings, and the Mariners have played a significant portion of their season within that backdrop. Still, the gap between what Seattle is producing now and what it produced last year is part of why the early at-bat execution matters. In 2025, Seattle finished with 4.75 runs per game, ranking 10th in MLB, and posted a 766-run season.

The shift toward near-full health also makes the first-pitch emphasis more noticeable rather than less. Yahoo Sports points out that the Mariners are finally running nearly their entire “full healthy lineup” out for the first time all season, while noting one absent player under a nickname reference (“Bringo Dingo”). That matters because when a team is closer to its intended batting order and roles, lingering offensive inefficiencies are more likely to be systemic. If Seattle were consistently missing key pieces, the first-pitch difficulty could be dismissed as a roster-related workaround. Instead, the continued emphasis suggests the batting approach and early counts are areas that the Mariners have to fix regardless of who is in the lineup.

In practical terms, the first pitch becomes a gatekeeper for the rest of the at-bat. If a batter is forced to play defense after taking an unfavorable pitch, or if the team swings into weak pitches less often than it should, the offense can spend too many plate appearances in extended, lower-leverage counts. The Yahoo Sports piece highlights that this first-pitch weakness is not merely a small statistical oddity, but something the Mariners “don’t have to wait around to see.” In other words, it is visible in how Seattle’s rallies tend to start, and it can set the ceiling for how often the Mariners turn base runners into actual runs.

For the Mariners, that creates a simple next question that extends beyond this one slice of the lineup. If Seattle’s overall run production is around league average but its scoring rate is still low, then the distribution of offense likely matters as much as the total. Watch whether the Mariners can convert more first-pitch opportunities into quality contact, including early-count swings that create traffic rather than chasing at-bats later.

Over the next stretch, the team’s ability to correct first-pitch execution could also affect how managers shape innings and at-bats later in games. Teams that generate more offense early tend to keep pressure on the opposing bullpen, while also allowing hitters to approach later pitches with a freer mindset. For Seattle, making a first-pitch problem disappear would be the most direct path back toward the type of run environment it produced last season.

At the same time, any single statistical framing has to be treated as a piece of the broader puzzle. Even if first-pitch performance is a major culprit, the Mariners still have to defend their run creation against park effects, opponent pitching styles, and sequencing factors that vary day to day. The first-pitch fix will not instantly erase all issues, but it is likely to be one of the more actionable levers the Mariners can pull as they continue to seek a more reliable, consistently scoring offense.