It wasn’t a large undrafted free agent class for the Pittsburgh Steelers — frankly, it never is, but the Steelers landed some rather intriguing pieces following the conclusion of the 2025 NFL Draft, adding seven players via undrafted free agency, including two rather intriguing wide receivers, an uber-athletic tight end and a small-school offensive lineman that brings real intrigue.
But there’s one undrafted free agent signing that has drawn the most attention and has been universally praised for the Steelers. That would be Iowa safety Sebastian Castro.
After going undrafted, Castro decided to stick in the Black and Gold, signing with the Steelers, giving him a shot to compete for a roster or practice squad spot as that versatile safety that can play in the box or in the slot.