Sebastián Castro is a versatile defensive back who played for the Iowa Hawkeyes before entering the 2025 NFL Draft. Standing 5'11" and weighing 202 pounds, Castro hails from Oak Lawn, Illinois. He redshirted in 2019 and gradually became a key contributor to Iowa's defense. In the 2024 season, he recorded 57 tackles, including three tackles for loss, one interception, and forced two fumbles, earning third-team All-Big Ten honors. Castro's 2023 campaign was particularly impressive, as he tallied 61 tackles, eight tackles for loss, a sack, 11 pass breakups, and three interceptions, including one returned for a touchdown, leading to his selection to Pro Football Focus's All-America team as a cornerback.
Following his college career, Castro went undrafted in the 2025 NFL Draft but was signed by the Pittsburgh Steelers as an undrafted free agent. Scouting reports highlight his aggressive playstyle, football IQ, and versatility, noting his ability to play in the slot, near the line of scrimmage, and deep safety. However, concerns about his athleticism and overaggressiveness in run defense have been noted. Despite these concerns, Castro's experience and leadership are expected to make him a valuable asset to the Steelers' defense.
