Mariners May Have Found Their Next Intriguing Homegrown Arm

Up-and-coming pitcher Nathan Taylor is poised to become a key figure in the Mariners' strategic homegrown talent development, potentially alleviating future free agency losses.

The Mariners keep stockpiling arms, and that matters because their homegrown rotation won’t be frozen in time forever. Logan Gilbert is the first of that group set to reach free agency in 2028, with George Kirby next in 2029 and Bryce Miller and Bryan Woo following in 2030, barring extensions.

Seattle doesn’t appear rattled by that timeline. Kade Anderson is already lined up for the Opening Day roster, and more pitching help is coming behind him.

Ryan Sloan and Mason Peters are still a few years from their debuts, and the organization continues to bet on arm talent through the draft. In that vein, some around the game already think Seattle’s 2026 class could feature the next major franchise starter.

One name to watch is third-round pick Nathan Taylor, who is starting to look like a premium pitching project. Taylor came out of the University of Cincinnati after a solid college run.

He opened with a shaky first year, then made a big leap and finished his Bearcats career with a 3.60 ERA across 90 innings. That performance has already pushed him to Seattle’s No. 17 prospect, and the profile checks out.

Baseball America handed Taylor two notable honors in its breakdown of the Mariners’ latest draft class: best fastball and best secondary pitch. The fastball works in the low-90s on average, but he can reach 97 mph when needed.

The bigger edge comes from his extension, which stretches beyond seven feet and effectively gives hitters less time to track the ball. That kind of delivery would place him in roughly the 95th percentile for the metric, a trait that should help his pitches play better than the raw radar-gun reading suggests.

The pitch that really stands out is his slider. Taylor used it more than his fastball, and for good reason.

Thrown in the mid-80s, it has enough movement to make life miserable for hitters and produced a 44% whiff rate in his final college season. It has been his go-to pitch throughout his career and sits as his highest-rated offering.

Taylor also brings the kind of body that makes development staff salivate: 6-foot-5, 230 pounds, with room for more refinement. If the mechanics get cleaned up, there’s real upside for both the velocity and the full arsenal. And Seattle has shown it knows what to do with pitchers like that.

After a deeply disappointing 2026, the Mariners may need some patience before they’re back in the postseason picture, especially if the offseason stays quiet. Even so, the path back is taking shape. Piece by piece, Seattle keeps adding to the pipeline, and Taylor looks like one more arm worth keeping close on the radar.

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