MACK – HOT ARMS – DYLAN ROSS, GREGORI LOUIS, NICHOLAS CARRENO

 

Thanks to John From Albany for supplying the stats.

 

PERIOD:  7/14 – 7/27

 

Dylan Ross/AAA-Syracuse – 0.60-WHIP, 3.1-IP, 3-K, 0-BB, 0-R, 0.00

Dylan Ross is a right-handed relief pitcher in the New York Mets organization (currently with Triple-A Syracuse Mets).

He is 6'5", 250–251 lbs, bats/throws right, born September 1, 2000 (age 25) in Statesboro, Georgia. He was drafted by the Mets in the 13th round (389th overall) of the 2022 MLB Draft out of the University of Georgia and signed for $125,000.

He attended Statesboro High and Georgia Premier Academy, then pitched at Eastern Kentucky (limited 2020), Northwest Florida State College (2021: solid starter numbers), and Georgia (2022).

He needed Tommy John surgery after just two starts at Georgia, which dropped his draft stock. A UCL revision surgery in 2023 delayed his pro debut further.

He made his professional debut in September 2024 (one scoreless inning with 3 Ks for Low-A St. Lucie) after missing most of 2022–2024, then struggled in the Arizona Fall League.

In 2025 he broke out as a reliever, rising quickly from High-A Brooklyn to Double-A Binghamton to Triple-A Syracuse.

Across 49 appearances and 54 IP he posted a 2.17 ERA, 1.15 WHIP, 80 strikeouts (35.7% K rate), and 33 walks (5.5 BB/9), with seven saves.

In 2026 he was optioned to Syracuse in spring training, dealt with early arm fatigue (7-day IL, rehab at St. Lucie and Brooklyn), and has struggled more at Triple-A (around a 7–8 ERA range in ~25–26 IP with elevated walks, though still missing bats).

He remains a high-upside power-arm prospect ranked in the Mets’ top 20 or so by various outlets (e.g., MLB Pipeline ~No. 17). Control and health are the main questions for a potential MLB bullpen role.

Ross throws from a three-quarters arm slot with simple “dart-thrower” mechanics and excellent extension (~7 feet), which helps his stuff play up. His four-pitch mix (usage roughly 33% fastball, 33% splitter, 30% slider, ~4% curve in 2025 Triple-A looks) is built around power:

Four-seam fastball: Mid-to-upper 90s (sits ~96–98 mph, averages ~97 in Triple-A samples), has touched 100–102 mph. Average spin (~2,200 rpm) and shape, but velocity + extension make it play above average (scouting grades often 60). It gets on hitters quickly.

Splitter: His best secondary and a true plus pitch (often graded 55–60). Sits mid-80s to low-90s (avg ~89–90, up to 93), very low spin (often ~700 rpm, a “spin killer”), with heavy downward dive (significant extra drop vs. the fastball). Excellent tunneling with the heater; high whiff rates and very tough on lefties especially. He has thrown it heavily at times.

Slider: Mid-to-upper 80s with gyro/cutter-like action (limited horizontal break but effective gloveside movement). Primarily used against right-handers to generate chase; solid swing-and-miss potential (high Whiff% in samples).

Curveball: Occasional mid-80s offering used sparingly as a change-of-pace/get-me-over pitch for eye-level variation.

Strengths: Elite velocity and extension, plus splitter that disappears, high strikeout upside in short stints.

Concerns: Command/control (walk rates often elevated, especially at higher levels), consistency after two UCL surgeries, and predictability if the movement profile doesn’t expand. Evaluators see a potential late-inning power reliever if he throws more strikes and stays healthy.

 

Gregori Louis/A+ Brooklyn – 2.18-WHIP, 3.2-IP, 4-K, 5-BB, 0-ER, 0.00

Gregori Alexander Louis is a left-handed relief pitcher in the New York Mets organization (currently with High-A Brooklyn Cyclones).

Born October 28, 2002, in San Pedro de Macorís, Dominican Republic (age 23 as of 2026).

Bats/Throws: L/L.

Listed at 6'3", 161 lbs.

Signed by the Mets as an amateur free agent out of the Dominican Republic on June 29, 2022.

He has remained a pure reliever throughout his pro career (no starts listed in available stats).

He debuted in the Dominican Summer League in 2022 and has progressed through the Mets system with stops at FCL Mets, Low-A St. Lucie, High-A Brooklyn, and a brief assignment to Double-A Binghamton in 2025.

Notable seasons: 2024 stood out: Dominant at Low-A St. Lucie (4-0, 1.49 ERA in 42.1 IP over 20 games, 44 K, 24 BB) before a promotion to Brooklyn (1.08 ERA in 8.1 IP). Overall that year he posted a 1.33 ERA across levels with strong strikeout rates and limited hard contact.

2025 was more challenging (around 5.64 ERA across levels, including time on rehab in the FCL), with higher walk and home-run rates.

2026 (High-A Brooklyn): Early returns show solid strikeout ability (high K/9 in the 11+ range in some splits) but elevated walks (BB% often in the high teens to 20%), resulting in ERAs in the mid-4s range in available updates (e.g., around 4.2–4.6 in 20+ IP samples). He has recorded saves and continues working primarily in relief.

Fastball: Mid-to-high 90s. His most trusted pitch; he feels comfortable throwing it in any count. Velocity plays up because of his unique delivery (described as having “funk” to the glove arm that makes the ball hard for hitters to pick up and square up). It gets on hitters quickly.

Slider: Usable against both left- and right-handed hitters.

Changeup: Showed well in his High-A debut and has been a developing secondary.

Cutter: Actively developing, inspired by Kenley Jansen (a pitcher Louis follows). Coaches viewed it as a potential weapon especially against right-handed hitters.

Secondaries have shown progress in consistency but were still developing as of the 2024 report. His left-handedness, combined with the velocity and deception, gives him value as a potential multi-inning or matchup relief option. Stamina profiles point to a bullpen role.

Overall, Louis is a projectable lefty reliever with intriguing raw stuff and a track record of missing bats at lower levels.

 

Nicholas Carreno/A+ Brooklyn – 0.67-WHIP, 6.0-IP, 6-K, BB, ER, 1.50

Nicolas (or Nicolás) Gabriel Carreno is a 20-year-old left-handed pitcher in the New York Mets’ minor league system (born June 9, 2006, in Barcelona, Venezuela; listed at 5'10", 155 lbs; B/T: L/L).

He signed with the Pittsburgh Pirates as an international free agent on January 15, 2023 (undisclosed bonus; he was undersized with a then 89-91 mph fastball).

The Mets acquired him from the Pirates on July 30, 2024, in exchange for left-hander Josh Walker.

He has progressed from the Dominican Summer League (DSL) to the Florida Complex League (FCL), Single-A St. Lucie Mets, and High-A Brooklyn Cyclones (promoted June 11, 2026).

Early years: Struggled with control in the DSL in 2023 (10.50 ERA). Improved in 2024 (combined 3.66 ERA, high strikeout rates across Pirates and Mets DSL affiliates).

2025: Mixed results in FCL and a late promotion to St. Lucie (overall 5.72 ERA in 28.1 IP).

2026: Strong start at Single-A St. Lucie (1.94 ERA in 41.2 IP, 58 K, 21 BB).

He has shown high strikeout ability and ground-ball tendencies at times, but walks remain an issue (elevated BB rates).

He is still young and developing, with potential as a starter or (more likely longer-term) reliever depending on command and repertoire expansion.

Carreno throws from a slingy three-quarters arm slot with a long arm action. He currently relies primarily on a three-pitch mix: four-seam fastball, two-seam/sinker fastball, and slider. He has not featured a changeup in recent reports (he worked on one earlier with the Pirates, but it has been paused).

Four-seam fastball: Sits low-to-high 90s (averages ~94–95 mph, tops out at 98). Above-average spin (~2,500 RPM) and roughly average induced vertical break (~15 inches). Usage around 30% at St. Lucie; can be hittable when he grooves it due to command issues (opponents have had success against it at times).

Two-seam/sinker: Similar velocity (around 95 mph), with less vertical break and more arm-side run (extra 4–8 inches of horizontal movement). Used ~30%; generates weaker contact and better results than the four-seamer in lower levels.

Slider: His best pitch. Sits low-80s to low-90s (averages ~84–86 mph). Sharp, cutter-like action with modest horizontal movement (1–5 inches). High usage (~40%); excellent whiff rates (often 40%+) and strong results against hitters (e.g., very low batting lines and high swing-and-miss in the Florida State League). He commands it better than his fastballs.

Scouting notes highlight the velocity jump since signing and the effectiveness of the slider, but note that refining fastball command and developing a reliable third pitch (changeup or similar) will be key for higher levels, especially if remaining a starter. Smaller stature is a noted factor, though he has added some strength

He is an intriguing Mets lefty prospect with rising stuff and strikeout upside, currently at High-A.