MLB insider nails it with why Mariners trading a starting pitcher is a bad idea

The Mariners' pitching has been a hallmark of the organization since its crop of homegrown talent reached big-league maturity. Even with the offensive (and somehow defensive) production of the team falling short of expectations thus far, the pitching has been outstanding. Mariners pitchers have combined for a 3.14 ERA, fourth in MLB.

As a result, it has become an annual tradition to discuss the trade market for Seattle's best arms, namely its rotation. This year, ESPN's Jeff Passan got things started with a hot take that the Mariners should look to trade one of their rotation pieces after years of refusing to do so. However, it didn't take long for others to disagree.

Jim Bowden believes all of Seattle's starting pitchers will play a key role in the team's success in 2026

In a recent conversation with Seattle Sports, Jim Bowden highlighted that although it may seem like the team has an excess of talent now, it doesn't take much for that to change. Injuries and natural regression are highly unpredictable when it comes to pitching and past performance is never a perfect indicator of what one might accomplish in the future.

"At some point, you’ll move on from Luis Castillo. At some point, one of them’s going to blow out, and then all of a sudden eight’s going to become six. And then all of a sudden, someone’s not going to be as good as you thought and now you’re down to five. I mean, that’s how quickly it happens. So for me, that’s the one part of the Mariners team I’m not touching."

Jim Bowden

The Mariners are already seeing this with Bryce Miller, whose injuries have limited the quantity and quality of his time on the field. There haven't been many updates on his return timeline for the past few weeks but the latest report suggested that he'd miss at least a month of games. He has yet to recreate the magic he had in 2024 and it's unclear when things might start looking up for him.

On the other hand, Emerson Hancock has exceeded expectations this year. Since being called up to replace Miller, he has posted a 2.04 ERA with a 2.38 FIP, a drastic improvement over his past results at this level. His recent changes have clearly had a positive impact on his results, but it remains to be seen whether his newfound success is sustainable.

But perhaps the most compelling counterargument to a trade is that there isn't a clear position of need for the Mariners. Their farm system is one of the best in the sport and although it's not perfect, their roster isn't severely lacking at any position. The bats may be cold now but unless they remain frigid for the next few months, the lineup still projects to be quite successful.

The overarching idea is that Seattle shouldn't be taking things for granted and rushing to make unnecessary moves. In the next few years, the front office's propensity to strike deals for players like Logan Gilbert and Luis Castillo may change as top prospects Kade Anderson and Ryan Sloan get closer to the show but for now, their refusal to strike any trade deals is well-founded.