Luis Reyes Emerges as One of the Chicago White Sox’s Most Intriguing Young Arms

Within a rebuilding Chicago White Sox organization that is increasingly reliant on internal development, Luis Reyes has quietly positioned himself as a name worth tracking closely. At just 20 years old, the right-handed starting pitcher has earned his first appearance on the South Side Sox Top 100 Prospects list, a milestone that reflects both his steady progression and the growing belief in his long-term upside.

Reyes is not a headline-grabbing prospect yet, nor has his path been linear. Instead, his rise has been defined by incremental gains, physical maturation, and flashes of dominance that hint at something much bigger down the line.

Background and Physical Profile

Signed by the White Sox on January 15, 2023, to a $700,000 bonus as an international free agent, Reyes entered professional baseball as a projectable arm rather than a finished product. Standing 6-foot-2 and weighing 190 pounds, he has added noticeable strength since his early days in the system, a development that has directly translated to improved velocity and durability on the mound.

Reyes throws from a loose, easy arm action and has shown the ability to repeat his delivery with consistency, an important trait for a young starter still learning how to navigate professional workloads. His athleticism and clean mechanics give evaluators confidence that further refinement is achievable rather than speculative.

2025 Season Overview at Kannapolis

The 2025 season marked Reyes’ first full campaign at a traditional full-season affiliate, as he spent the entire year with the Kannapolis Cannon Ballers at the Low-A level. Doing so at just 19 years old put him at nearly three years younger than the average pitcher at that level, making context essential when evaluating his results.

Over 23 starts, Reyes logged 87 innings, finishing with a 4–9 record, a 4.34 ERA, and a 1.40 WHIP. He struck out 88 batters while issuing 37 walks, good for a strikeout rate north of 9.0 per nine innings. From a surface level, the numbers appear uneven, but they tell only part of the story.

Within the White Sox system, Reyes ranked 13th among all right-handed starting pitchers according to South Side Sox’s internal evaluations, and he produced an estimated 1.7 WAR over the season—solid output for a teenager facing older competition.

Pitch Arsenal and Stuff

Reyes’ arsenal is headlined by a fastball that has taken a meaningful step forward. Once sitting in the high-80s to low-90s range, the pitch now comfortably lives in the low-to-mid 90s and has touched 97 mph. The added velocity has given him more margin for error and allowed his secondary offerings to play up.

His most important weapon, however, is his slider. Thrown in the 81–84 mph range, it accounts for nearly 50 percent of his total pitches and already shows the traits of a legitimate out pitch. The slider features late bite and enough depth to miss bats, particularly against right-handed hitters, and it has become the foundation of his approach.

Reyes’ other pitches remain works in progress. His changeup and any additional breaking offerings are still inconsistent, but the framework of a starter’s arsenal is clearly in place. Continued development of at least one secondary pitch beyond the slider will be crucial as he moves up the ladder.

A Tale of Two Halves in 2025

Reyes’ season can be divided into distinct phases, illustrating both the volatility and promise of his profile.

The early months were difficult. April and May exposed command issues and the challenges of adjusting to a longer season against more disciplined hitters. However, something clicked in mid-summer, and Reyes delivered one of the most dominant stretches by any pitcher in the system.

In June, he was named Minor League Pitcher of the Month after allowing just one earned run across 25 innings. During that span, he posted an astonishing 0.36 ERA and a 0.72 WHIP, highlighted by two seven-inning complete-game shutouts. The performance showcased what Reyes can look like when his mechanics, command, and confidence align.

A natural regression followed in July, when he posted a 5.59 ERA, but Reyes showed resilience by finishing the season on a stronger note in August with a 3.60 ERA. That ability to rebound is an encouraging indicator of his makeup and adaptability.

Developmental Progress and Next Steps

Compared to his earlier professional seasons in the Dominican Summer League and Complex League in 2023 and 2024, 2025 represented a clear step forward. Reyes improved his command, handled a heavier workload, and proved he could dominate stretches of competition despite his age disadvantage.

The next phase of his development will focus on consistency. Establishing a reliable professional routine, continuing to refine his secondary pitches, and logging innings without sacrificing command are the key objectives. With his size, arm strength, and athleticism, the ingredients for a mid-rotation starter are present.

If Reyes can maintain or improve his control while continuing to sharpen his slider and changeup, his ceiling rises considerably.

Looking Ahead to 2026

Given his progress and age-relative performance, expectations are that Reyes will open the 2026 season in the High-A rotation with the Winston-Salem Dash. That assignment will present a tougher test, but it is also the logical next step for a pitcher who has already shown he can handle aggressive challenges.

For the White Sox, Reyes represents exactly the type of arm rebuilding organizations hope to uncover: young, cost-controlled, and trending upward. He is not a finished product, but the upside is very real.

As the system continues to evolve and several prospects depart or arrive via trade and Rule 5 activity, Reyes’ emergence adds another layer of optimism. If his development continues on its current trajectory, he may not remain an under-the-radar name for much longer.