BIO: Three-year starter awarded All-Conference honors as a sophomore.
POSITIVES: Hard-working team leader best in a small area. Quickly gets into blocks and walls defenders from the action. Built low to the ground, explosive at the point and works to stay square. Effective with the shotgun snap.
NEGATIVES: Marginally athletic, lacks strength and rarely opens up the middle of the field. Heavy-footed and not comfortable in space.
ANALYSIS: A tough, over-achieving blocker, Castillo offers limited upside and is practice-squad material.