These Mariners prospects are next to go after Josh Naylor trade package

The Seattle Mariners' farm system is thinner on Friday than it was on Thursday, as the club's blockbuster deal for Josh Naylor sent two well-regarded hurlers to Arizona. And in all likelihood, the system is only going to get more thinned out.

The buzz around the industry is that the Mariners aren't done, as still in their sights is Diamondbacks slugger (and old friend) Eugenio Suárez. President of baseball operations Jerry Dipoto could also go after an ace reliever and perhaps even an ace starter.

It's a good thing, then, that Seattle's farm system remains loaded with talented prospects to dangle as trade bait. But after Brandyn Garcia and Ashton Izzi, which ones could be next to go?

Note: All ranks are according to MLB Pipeline.

These 3 prospects could be next to leave the Mariners after the Josh Naylor trade

1. Harry Ford, C: Mariners No. 3, MLB No. 50

Please try to contain your surprise at Ford's inclusion on this list. Or rather, don't. He's been an obvious trade candidate for months, and it isn't exactly getting easier to anticipate him getting called up to Seattle instead.

It was close to happening in late June, but that was in response to a Mitch Garver injury scare that proved to be a false alarm. He's even gotten his bat going with a .815 OPS since the start of June, thereby reestablishing himself as a worthwhile backup for AL MVP candidate Cal Raleigh.

This pretty much means there's a brick wall between Ford and the Mariners' roster, so all he can do is keep doing his thing for Triple-A Tacoma. It's to his credit that he's doing it very well, especially with a .915 OPS and nine home runs since the start of May.

It's clear that the 22-year-old has more value to the Mariners as a trade chip than as a near-future building block. There is also the question of whether his value can get any higher, especially given that there are questions about his ability to stick at catcher.

2. Tyler Locklear, 1B: Mariners No. 9

As with Ford, Locklear now finds himself looking up at a position that offers no daylight to playing time in Seattle. It's Naylor's spot now and for the rest of 2025.

Which really is too bad for Locklear, because he's also like Ford in that he is absolutely on one for Tacoma right now. Since making an adjustment with his hitting mechanics in June, he has caught fire for a 1.312 OPS and 13 home runs in his last 28 games.

To be sure, the general prospect profile of a right-handed-hitting, right-handed-throwing first baseman is not especially inspiring. But if a team has something the Mariners want and is in the market for a slugger who can help right away, it's hard to do better than the 24-year-old Locklear.

3. Felnin Celesten, SS: Mariners No. 6, MLB No. 62

This is a bit of a wild card pick. There hasn't been any buzz on Celesten as a trade chip, and it was indeed only two years ago that the Mariners signed him out of the Dominican Republic for a sizable $4.7 million bonus.

However, the 19-year-old is in a weird spot right now. His stock has taken a hit amid a generally unimpressive season for Single-A Modesto, yet he's recently begun to turn things around after dealing with vertigo-like symptoms earlier in the year. He hit a solid .290 in June and had an 11-for-28 run in six games earlier this month.

As Celesten is nonetheless third in the infield prospect pecking order behind Colt Emerson and Michael Arroyo — fourth if you want to count Cole Young, who recently lost his prospect status — he seems vaguely expendable just on those merits. And if this year has given the Mariners concerns about his development, it would be best to act on those now rather than wait and risk having his stock fall even further.