Rubio has the size and role fit to develop into a useful Steelers defensive end. The immediate ask is simple: use his hands, hold the point and learn from a veteran-heavy front.
Strengths: NFL-ready size, strong scheme fit at 3-4 end, roster security and room to grow as a rookie.
Weaknesses: He is still a young player who must improve rush counters, pad level and consistency against veteran NFL linemen.