Rubio (6'5/321) was a four-star recruit for the Fighting Irish in 2021. He spent the first three years of his career as a backup before working his way into a rotational role in 2024, when he amassed 2.5 TFLs and one sack. His 2025 season ended after just six games because of an elbow injury. Gabriel is a solid run-defender who doesn’t bring much to the table as a pass-rusher. Given his limited body of work, he will likely be considered a developmental piece for the Steelers.