The Mariners' fading postseason hopes depend on these 3 outcomes

At 4.5 games back in the AL West, the Seattle Mariners are running out of time to turn things around. The trade deadline has come and gone, leaving few opportunities to reshape the roster from here on out. Now, the Mariners' path to October baseball depends on who is already in the organization, and what they can do for the rest of season.

The addition of Taylor Ward and the return of Brendan Donovan will hopefully provide a much-needed offensive boost in the final weeks of the season. However, if the Mariners want to avoid becoming one of baseball's biggest disappointments in 2026, they'll need more impactful players as the season progresses.

The core hitters have to break out of their season-long slump

Seattle's offense has been one of their biggest weaknesses all season. Conversations surrounding Cal Raleigh's performance have not been quiet, especially considering he has hit just 12 home runs this year compared to his record-breaking 60 in 2025. However, he's not the only one underperforming at the plate.

Julio Rodríguez is also having a slow season that features a stint on the IL, and just hasn't been the consistent superstar the Mariners need him to be. Josh Naylor, although solid at the plate, has been less productive with big hits and home runs than expected. Randy Arozarena is trending upwards, but still struggles with swing-and-miss tendencies.

This has resulted in an offense suffering through overlapping slumps that never seem to end. The Mariners don't need every hitter to suddenly turn it around, but they do need their core to start producing. Ward and Donovan can help, but they can't carry the lineup on their own.

Players set to return from the IL actually need to produce

Another obstacle for the Mariners this season has been health. Players seem to be constantly cycling on and off the IL, making any type of consistency difficult to achieve. While this issue has primarily affected the offense, it has also had a noticeable impact on the pitching staff.

Following the departure of Luis Castillo, the Mariners are relying heavily on a younger rotation made up of Logan Gilbert, George Kirby, Bryan Woo, and Bryce Miller. A talented list for sure, but Castillo's departure might put additional pressure on both the starters and the bullpen considering a few key pitchers, like Matt Brash, Carlos Vargas, and Cooper Criswell have spent extended amounts of time on the IL.

On a positive note, Vargas began a rehab assignment on Saturday, August 8 and is expected to return in mind-to-late August. His return could be a big boost for the bullpen considering how dependable he was last season. Getting him back could give the Mariners some much-needed stability.

Fortunately, the return of Brash is also near. When healthy, the combination of Brash and Andrés Muños gives Seattle an extremely intimidating late-inning duo. The acquisition of Seranthony Domínguez adds another experienced arm, however his rough debut in Seattle against Detroit on August 4th only reminded the Mariners how badly they need Brash back at full strength.

Mariners must bank on reinforcements from the farm system

With one of the strongest farm systems in baseball, the Mariners may need to tap into that potential to save their season. There has been plenty of hype surrounding elite pitching prospects Kade Anderson and Ryan Sloan, both of whom rank in the top 10 of the global prospect ratings. But Seattle's biggest need isn't necessarily another young arm, it's more offensive production.

Michael Arroyo, for example, is a consistent right-handed bat, something the Mariners currently need. Since arriving in Triple-A Tacoma, he is batting .327 with a .977 OPS while showing exceptional strike-zone discipline.

Lazaro Montes has also caught some attention. The 6-foot-5 left-handed bat is hitting .284 with a .928 OPS in Triple-A. He offers a raw power that could replace Luke Raley, who will miss the remainder of the season with a forearm strain.

While Arroyo seems to be the more mature option, Montes still offers great long-term potential. If Seattle is worried about promoting either one too soon, easing them into the majors as a designated hitter could provide experience while adding some offensive spark to the lineup.

The bottom line for the Mariners is simple

Seattle's playoff hopes are still alive, but every game carries postseason weight. If the Mariners want to make October baseball happen, they need to make changes now. As one of the most winnable divisions in major league baseball, the AL West is yet to be decided.

The offense needs to make impactful changes, injured players need to return healthy, and the organization needs to consider tapping into the farm system if the roster continues to struggle.

If any of these start to happen, the Mariners could find themselves back in the thick of the postseason conversation. If nothing changes, 2026 might be remembered as one of the most disappointing seasons in Mariners history.

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