MLB Pipeline’s latest top 100 update didn’t wipe out the shine on the Mariners’ farm system, but it did take a bite out of two of Seattle’s most promising names.
Jonny Farmelo and Felnin Celesten were both rewarded for strong runs at High-A Everett with same-day promotions to Double-A Arkansas, and Farmelo even came away with Northwest League MVP honors for what he did with Everett. That success had them moving in the right direction. Friday’s new rankings, though, showed how much work still sits ahead.
Celesten dropped from No. 47 to No. 60, while Farmelo slid from No. 70 to No. 83, each falling 13 spots in MLB Pipeline’s refreshed top 100.
The concern is pretty straightforward: both hitters ran into real trouble after the jump from High-A to Double-A. Celesten’s production cratered, falling from a 137 wRC+ to a 44 wRC+. Farmelo’s line held up better, but he still dipped from 120 to 105.
The numbers behind the slump are hard to ignore, even with Dickey-Stephens Park and the Travelers carrying a reputation as a tough place for hitters. Celesten’s strikeout rate jumped from 20.3 percent at High-A to 33.6 percent at Double-A. Farmelo’s climbed from 24.6 percent to 28.0 percent.
Celesten’s walk rate also got cut nearly in half, going from 12.4 percent to 6.7 percent. TJStats had his in-zone whiff rate at the Double-A level in the 14 percentile over 134 plate appearances, and the article notes that whether the groin injury that ended his season played a role or not, he was not getting the job done at the plate in Double-A.
Farmelo’s case is a little easier to explain away on the surface. His walk rate actually rose from 15.5 percent to 16.4 percent, which at least suggests a more patient approach. But MLB Pipeline’s latest writeup still points to trouble handling soft stuff, and that’s the kind of issue that gets attention fast when pitchers at the major league level are already leaning less on fastballs than they used to.
There is recent precedent for Everett-to-Arkansas growing pains. Lazaro Montes and Michael Arroyo both got humbled by that move before reaching the majors.
Arroyo did it while trimming his strikeout rate, though, while Montes did not. The difference matters here because Celesten and Farmelo are not built as pure power bats; both need to stack consistent at-bats and keep making contact.
Still, there’s no reason to push the panic button. Both remain top-100 prospects, and the Mariners’ system is hardly in trouble after graduating four such players to the majors in 2026. The finish was rough for Celesten and Farmelo, but the bigger picture still looks strong.
They’ll be fine. Probably. Hopefully.
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