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Clark's Late Bloom: From Indies to Fall Stars
9 Nov
Summary
- Clark signed as an undrafted free agent over two years after his draft class.
- He transformed his pitching mechanics with Tread Athletics.
- Clark was named to the Arizona Fall League's Fall Stars team.
Jonathan Clark, initially an overlooked undrafted free agent, has emerged as a notable success story within the White Sox system. After pitching in independent leagues with little success, Clark committed to Tread Athletics to refine his pitching mechanics, enhancing shoulder flexibility and range of motion. This change significantly improved his command and control.
Clark's resurgence began in 2025, where he dominated at High-A levels despite being older than his peers. His impressive ERA and mature approach earned him a mid-season call-up to Double-A Birmingham. He finished the 2026 season as Birmingham's primary closer, sharing duties but receiving more high-leverage opportunities.
His strong performance continued into the Arizona Fall League, where he was named to the Fall Stars team, further solidifying his status. Despite his age relative to his competition, Clark's upward trajectory suggests he is nearing a potential call-up to the major leagues.
