Under is an evaluation of the prospects within the farm system of the Seattle Mariners. Scouting stories had been compiled with data offered by trade sources in addition to my very own observations. That is the fifth 12 months we’re delineating between two anticipated aid roles, the abbreviations for which you’ll see within the “place” column beneath: MIRP for multi-inning aid pitchers, and SIRP for single-inning aid pitchers. The ETAs listed usually correspond to the 12 months a participant needs to be added to the 40-man roster to keep away from being made eligible for the Rule 5 draft. Handbook changes are made the place they appear acceptable, however we use that as a rule of thumb.
A fast overview of what FV (Future Worth) means might be discovered right here. A a lot deeper overview might be discovered right here.
The entire ranked prospects beneath additionally seem on The Board, a useful resource the location provides that includes sortable scouting data for each group. It has extra particulars (and up to date TrackMan knowledge from varied sources) than this text and integrates each group’s checklist so readers can evaluate prospects throughout farm techniques. It may be discovered right here.
Different Prospects of Word
Grouped by kind and listed so as of desire inside every class.
Working Again From Damage
Cole Phillips, RHP
Taylor Dollard, RHP
After sitting about 91 mph in the summertime after his junior 12 months, Phillips was sitting 94-98 with relative ease throughout his draft spring till he had Tommy John in early April. The Braves nonetheless noticed match to offer him about $1.5 million within the second spherical. The Mariners used their newbie stories to tell their choice after they traded for Phillips as a part of the Jarred Kelenic/Evan White contract swap. Phillips wanted a second Tommy John earlier than the 2024 season, after which had a stress response in his elbow that has shelved him for all of 2025 to date. He has but to throw a single professional pitch in an precise recreation, and is on tempo to return in August. It’s robust to offer him a important checklist FV at this level, however he’s a high-priority goal for scouting throughout Bridge League/instructs. Dollard is coming off rehab for surgical procedure to restore a torn labrum and is simply sitting within the upper-80s via a couple of half-dozen appearances since his return. At peak, he regarded like a pitchability backend starter.
Fringe Hitters
Jared Sundstrom, OF
Invoice Knight, CF
Rhylan Thomas, OF
Milkar Perez, 1B
Austin St. Laurent, INF
Victor Labrada, OF
Sundstrom is an athletic 23-year-old energy/velocity outfield prospect from UC Santa Barbara. He’s enjoying principally proper area, and is one other hitter on this org whose swing leaves him vulnerably tardy on the outer third. Knight is a 40-hit/30-power man who can actually play heart area. The 25-year-old is at Arkansas and has a 102 wRC+ after posting a 94 at Everett final 12 months. Thomas is a slender, tough-to-Ok nook outfielder out of USC who’s a profession .300 hitter within the minors. He had his first huge league cup of espresso in 2025 and is a advantageous upper-level depth possibility. Perez is a 23-year-old Nicaraguan first baseman who may have run for Mayor of Modesto after his third full-season task there final 12 months. He has lastly reached Everett and is making a plus fee of contact from the left aspect. He’s a smaller man with out typical first base pop. St. Laurent was a 2024 Day Three choose who’s off to a very good begin with the bat at Modesto. He has a brief, downward-cutting swing that produces a ton of oppo contact. Labrada is high-motored, plus-plus working left fielder who appears to have made some changes at Double-A and is putting out a lot much less to date in 2025. He has fifth outfielder ceiling.
Ex-Two-Method Guys and Conversion Arms
Sauryn Lao, RHP
Hagen Danner, RHP
Grant Knipp, RHP
Lao, 25, was a 3rd baseman within the Dodgers system and transformed in 2022. Danner, 26, was a two-way prospect in highschool who started his professional profession as a catcher earlier than he moved again to the mound and has been toiling away at Triple-A since 2023. Each are mid-90s guys with sliders. Lao’s is nice, however his fastball performs down, whereas Danner’s stuff has been common for a short time now. Knipp was a two-way participant at Campbell who touched 100 on the 2024 Mix. He had TJ simply earlier than the 2025 season. Realistically, he’s an eventual reliever.
Good Breaking Stuff
Blas Castaño, RHP
Michael Hobbs, RHP
Juan Burgos, RHP
Peyton Alford, LHP
Castaño was initially a Yankee however was launched towards the tip of the 2023 season and hopped on with the Mariners. He’s a cool low-ish slot righty with a kitchen sink (emphasis on sink) repertoire that leans on his sinker, cutter, and sweeper. He debuted this 12 months and is an emergency depth possibility. Hobbs is a 25-year-old Double-A reliever who was drafted by the Dodgers, then was a Mets minor league Rule 5 choose in 2024, after which was traded to Seattle in March of 2025. He tries to sneak breaking balls into the highest of the zone after which elevate a low-90s fastball above it for chase. In 2025, it’s working; he’s main the Arkansas roster in swinging strike fee. He’s a bit too wild for a man who sits 91 to incorporate on the primary part, however he’s undoubtedly within the combine for emergency depth innings. Burgos is a 25-year-old Dominican reliever who’ll contact 98, albeit with ineffective motion. He pitches off his laborious slider/cutter, which is above common however performs down as a bat-misser as a result of he depends on it to take action many different issues. Alford is a enjoyable little (he’s 5-foot-8) undrafted lefty out of Virginia Tech whose 91-93 mph fastball has plus-plus vertical motion. Alford is a good athlete for his measurement and might snap off a pleasant curveball, however he’s 27 and his efficiency has regressed despite the fact that he’s repeating Double-A.
Funkadelic Relievers
Tyler Cleveland, RHP
Jimmy Joyce, RHP
Taylor Floyd, RHP
Cleveland is a 25-year-old submarine aid righty at Excessive-A. His stride route appears like Andy Petitte’s pickoff transfer, which has been altered for the reason that Mariners drafted him out of Central Arkansas. He appears like a Jimmy Herget kind specialist. As a result of I assume Joyce goes by “Jimmy” in order that he isn’t bombarded with jokes about stream of consciousness prose, I’ll spare everybody mine. Joyce has a cool and misleading low-release that he involves through a giant, open stride down the mound. His secondary pitches get huge lateral motion in both route, together with his changeup rising as his weapon of alternative earlier this 12 months earlier than he hit the IL in late April. Floyd was as soon as a 40 FV sidearm aid prospect with unusual arm energy for somebody together with his mechanics. His supply modified seemingly by chance coming into 2023, his stuff and command backed up, and he started bouncing round, from Milwaukee to Minnesota and now Seattle. He’s having a greater 2025 as his slider performs like a plus pitch at Arkansas.
Uphill Heaters
Anyelo Ovando, RHP
Pedro Da Costa Lemos, RHP
Evan Truitt, RHP
A 6-foot-5, XXL righty who generates over seven toes of extension down the mound, Ovando is a 24-year-old A-ball reliever who has 40-grade stuff, however a giant league body and supply. A 22-year-old Brazilian righty, Da Costa Lemos’ upshot, low-90s fastball is producing plus miss at Modesto. Truitt, 22, is an athletic, 6-foot righty who instructions an uphill fastball and cutter. He’s throwing strikes in Everett however has been homer-prone.
Lengthy-Time period Dev Initiatives
Dawel Joseph, SS
Aiden Butler, RHP
Dylan Wilson, RHP
Joseph signed for $3.3 million in 2024 and had a extremely terrible first professional season within the DSL, the place he hit .133. He’s off to a Ok-prone begin in 2025. Butler is a 6-foot-6 righty out of Polk State Faculty in Florida who has already pitched his manner off the advanced and to Modesto. He’s sitting within the low-90s and his breaking balls have plus spin, however his command is fairly uncooked. A 6-foot 19-year-old righty from Curaçao, Wilson has a low-90s fastball, two respectable breaking balls (a low-80s lateral slider and a slower, vertical curveball), and the makings of a viable splitter. He’s an above-average athlete with below-average bodily projection.
System Overview
That is most likely the one system in baseball that’s good despite the fact that it’s shallow. It’s uncommon for me to jot down up fewer than 30 guys in an org (with the extras I wrote up slightly over 50, however you get what I imply), and often once I do, it’s a stinker. However not solely is the Mariners farm system good, it’s arguably among the best handful in baseball as a result of it has so many potential impression bats up prime. Groups are determined for younger, everyday-quality place gamers, and Seattle has a number of kids with that sort of ceiling. Whereas I clearly have qualms about a few of these guys, there are such a lot of of them that it’s probably that at the very least a couple of will pan out, and that the group’s lineup three-ish years from now will probably be deeper and extra secure than the shallow group they’re working on the market proper now. If that’s too lengthy for Mariners followers/possession to attend for true replenishment, then a participant or two from this group might be traded. Potential on a regular basis hitters transfer the needle in commerce discussions in contrast to another prospect demographic, and the Mariners is perhaps snug dealing from their depth at catcher, or the center infield, or in heart as a way to make one thing occur sooner. Their redundancy at these spots may make it much less painful to half with one or two of the children at Everett if it means touchdown a very good hitter with a number of years of management remaining on his deal. They did this final 12 months with Aidan Smith within the Randy Arozarena commerce.
The Mariners are on this place due to their current draft methods, which have resulted in them including at the very least one over-slot excessive schooler early within the choice course of after which pivoting to senior indicators (or different older, low-bonus gamers) earlier than any of the opposite groups, placing them in place to take the very best accessible seniors. Ben Williamson was a type of low-bonus guys whose lack of negotiating leverage helped the M’s bonus pool math work out in 2023, and he’s been ok to succeed in the bigs. With the Mariners selecting third general this 12 months, they is probably not able to deploy any sort of enjoyable or novel technique; they may simply take an clearly good participant at choose three, pay him slot, after which stick to fit bonuses for the remainder of the draft.
Internationally, issues have been blended. The Mariners aren’t afraid to offer an enormous bonus to 1 man in that market, and maybe that is a part of why the org lacks general depth. The org wager huge on Dawel Joseph, and never solely has he struggled to seek out traction within the DSL, however his signing got here with huge alternative value. It’s robust to have a deep worldwide class when one man will get $3 million or extra, and when that one participant doesn’t work out, it usually means you punted on a complete 12 months of potential expertise cultivation.