Castillo has some varsity playing experience entering into his second season for Los Altos, and is a true plug and play linebacker at the second level of the defense. He shows he can fill gaps quickly, get off blocks without giving up ground and can play both inside or outside with cover abilities into the flats and is fluid in space when making tackles outside the box. As he continues to grow and develop, he should continue packing on weight to his frame and filling out and projects as an inside guy at the next level and through his prep career.

Castillo has some varsity playing experience entering into his second season for Los Altos, and is a true plug and play linebacker at the second level of the defense. He shows he can fill gaps quickly, get off blocks without giving up ground and can play both inside or outside with cover abilities into the flats and is fluid in space when making tackles outside the box. As he continues to grow and develop, he should continue packing on weight to his frame and filling out and projects as an inside guy at the next level and through his prep career.