The White Sox acquired Ziehl from the Yankees on Wednesday in exchange for outfielder Austin Slater, Mark Feinsand of MLB.com reports.
Recently promoted to High-A Hudson Valley, Ziehl has spent most of the 2025 season at Single-A Tampa, with whom he's posted a 4.00 ERA and 63:14 K:BB over 74.1 innings covering 14 starts. The 22-year-old was a fourth-round pick of the Yankees in the 2024 First-Year Player Draft.