Every year, a handful of players ranked outside the top 10 in their respective farm systems take meaningful steps forward to improve their stock and vault up prospect rankings. Part of the fun is trying to identify those breakouts before it happens. So today, we’re identifying Marlins prospects who have the potential to make a jump in 2026.

To qualify, a player must rank outside the organization’s preseason Top 10 prospects. All scouting reports are from Baseball America’s 2026 Prospect handbook, which you can purchase here.

You can find Top 30 prospect rankings for all teams here and all breakout candidates here.

Breakout Prospects

Fenwick Trimble, OF

BA Grade/Risk: 50/High
Adjusted Grade: 35

Track Record: Trimble turned a strong sophomore season at James Madison in 2024 into a fourth-round pick by Miami and signed for $550,000. He held his own at Low-A Jupiter after the draft, then opened 2025 at High-A Beloit before reaching Double-A Pensacola. Across the two stops he hit .253/.372/.402 with seven home runs, 19 doubles and 31 steals in 35 tries while posting an 18.8% strikeout rate and 13.8% walk rate.

Scouting Report: Trimble owns a short, efficient swing with above-average bat speed driven by strong wrists, which helped him to produce better underlying data than his surface stats might suggest in his first full professional season. Trimble recorded 88 mph average and 104 mph 90th percentile exit velocities. He rarely expanded the zone in 2025, chasing just 21% of the time, which he paired with an 18% in-zone whiff rate. The next step is generating more loft to access his strength. His contact rate and on-base ability play up because he’s a consistently impactful baserunner who improved his reads and jumps. He’s an above-average athlete whose speed and routes fit center field, though his arm grades as fringe-average and may push him to left field.

The Future: Trimble’s plate discipline, contact skills, power potential and chance to play center field give him a path to value. If he adds launch angle and maintains his efficiency on the bases, he projects as a regular with on-base skill and secondary value. He should return to Double-A to open 2026, with a realistic chance to reach Triple-A by midseason.

Scouting Grades: Hit: 55 | Power: 45 | Run: 60 | Field: 50 | Arm: 45

Esmil Valencia, OF

BA Grade/Risk: 50/High
Adjusted Grade: 35

Track Record: Valencia signed with the Astros out of the Dominican Republic in 2023 and made his stateside debut in the Florida Complex League in 2024. He spent most of 2025 at Low-A Fayetteville before being traded to Miami for Jesús Sánchez at the deadline. Post-trade, he excelled at Low-A Jupiter, hitting .327/.367/.510 with three home runs, five doubles and 14 steals in 24 games.

Scouting Report: Valencia is a 5-foot-10, 182-pound righthanded hitter with an upright, closed stance and a medium-high handset. His aggressive style permeates every part of his game, which cuts both ways. He posted a 33% whiff rate and near-40% chase rate, yet he produced frequent quality contact, especially late in 2025 when he logged multiple 100-plus mph batted balls, including three in his Jupiter debut. He is a savvy runner rather than a pure burner, using reads and anticipation to steal bases and take extra bases, though a 77% stolen base success rate reflects occasional poor decisions. Defensively, he handles center field and has shown the athleticism to stay there, and evaluators consider his arm one of the best in Miami’s system. Continued improvement to his routes and reads will determine whether he remains up the middle or shifts to a corner.

The Future: Valencia’s late-season jump in contact quality gives evaluators optimism, though he still needs to sharpen his swing decisions and continue adding strength. His speed-driven game and emerging power support the projection of at least a useful platoon outfielder. He should open 2026 in High-A Beloit.

Scouting Grades: Hit: 50 | Power: 45 | Run: 65 | Field: 55 | Arm: 65

Eliazar Dishmey, RHP

BA Grade/Risk: 50/High
Adjusted Grade: 35

Track Record: Dishmey signed out of the Dominican Republic for $50,000 in 2022. After an uneven performance at Low-A Jupiter in 2024, he returned there to open 2025 and posted a 3.13 ERA with 76 strikeouts and 42 walks in 74.2 innings. Promoted to High-A Beloit as a 20-year-old, he excelled, recording a 2.19 ERA with 32 strikeouts and just six walks in 24.2 innings to close out 2025.

Scouting Report: Dishmey showed the depth of his arsenal in 2025, working a five-pitch mix from a low-effort delivery and low three-quarters slot with above-average extension. His two- and four-seam fastballs sit 91-94 mph, touch 97, and play with run and sink at the knees and run-ride up in the zone. He spins the ball well and throws a borderline-plus, low-80s slider with sweep. He also mixes a high-70s two-plane curveball and a low-to-mid-80s changeup with significant fade and good separation off his fastball. Control was inconsistent early—reflected in 42 walks at Low-A—but sharpened notably after promotion, a promising sign for his long-term outlook.

The Future: Dishmey’s outcome range is wide. Added strength, improved consistency and possible velocity gains could elevate him toward a No. 3 starter ceiling, while a back-end rotational or bullpen role remain a realistic alternative if his strike-throwing stalls. He will return to High-A Beloit in 2026 to continue refining mechanics and command after a highly encouraging 2025.

Scouting Grades: Fastball: 50 | Curveball: 50 | Slider: 55 | Changeup: 55 | Control: 45