Seattle Mariners: Top 3 Pitching Prospects 2025

Ryan Sloan

Sloan is a thrilling prospect for the future. At just 18 years old, he has a long path ahead before making his debut in the Major Leagues. He was drafted in the second round directly out of high school and has yet to make his professional debut. This season, he is expected to spend most of his time playing in Low-A ball.

The Seattle Mariners view Sloan as a jewel in their crown, radiating optimism about what he can achieve on the mound. Towering at 6 feet 5 inches, he combines size with exceptional talent, setting himself apart from his peers. His fastball consistently clocks in the mid-90s. I expect this will increase in velocity as he develops. However, it is his secondary pitches that truly elevate his game; his slurve boasts impressive movement that leaves batters guessing, while his changeup can be devastating, making it a formidable weapon against hitters.

Though he remains a relative unknown in the professional realm due to his lack of minor league experience, the excitement surrounding Sloan is palpable. If he continues to cultivate his skills over the next two to three years, the Mariners could very well have a future ace on their hands, ready to dominate the major leagues.

Logan Evans, RHP

Evans is dependable, yet unflashy. He is a competent minor-league pitcher, though he lacks standout pitches that would typically dazzle scouts. He gets the job done, but one may question whether his arsenal will translate to success in the major leagues.

Selected by Seattle in the 12th round of the 2023 draft, Evans’s selection initially raised eyebrows, particularly given his lackluster college performance, highlighted by a troubling 5.88 ERA. However, he justified Seattle’s decision by delivering a strong performance for Double-A Arkansas in 2024, where he achieved an impressive 3.20 ERA and maintained a 48% groundball rate.

Evans primarily relies on his sinker, even though it is not considered a top-tier pitch. His most effective offering appears to be his sweeper. He also throws a four-seam fastball, a hard cutter, and a changeup in the high 80s. This varied arsenal allows him to remain competitive in the league. If he can refine his command and hone some of his pitches, Evans could emerge as a reliable innings eater, carving out a role in the middle of a major league rotation.

Jurrangelo Cijntje, SHP

The five-foot-eleven Dutch prospect stands out as one of the most captivating talents in baseball, primarily because of his unique ability to pitch with both hands. As a right-handed pitcher, he showcases impressive skills, featuring a powerful fastball that consistently hovers in the mid-90s range and occasionally spikes close to triple digits. His fastball is complemented by a well-placed slider that adds variety and depth to his repertoire.

In contrast, his performance as a left-handed pitcher leaves much to be desired. His fastball, sitting between 89 and 92 mph, lacks the same potency, and his sweeper lacks the sharpness needed to keep hitters off balance. Without significant improvements, it’s difficult to envision him making an impact as a lefty in the major leagues. Despite this, watching his progression as a switch pitcher is an intriguing experiment that could yield unexpected results.

As a right-handed option, he has the potential to develop into a reliable mid-rotation starter, adding depth to any pitching staff.