I believe Bubak was committed to us but during the coaching change, he decommitted and went to Arizona State (more factors involved than just the coaching change). Correct me if i'm wrong there. Certainly Riley and his staff went hard after him, as they didn't want to start off on the wrong foot losing a current commit to another P5 school.
To your walk-on comment and how you never really know what you are getting, absolutely. Take that a step further with guys like Brandon Reilly, Heung-Choi, Justin Jackson, and you can really make things not as pivotal on the recruiting trail. Especially since we are recruiting taller guys now, usually if you are that big in high school, you grew so fast you aren't comfortable with your body yet. I also know for a fact that we turned away an all-state lineman that wanted to walk-on while taking his academic scholarship and they said no because he wasn't the right height. Which I found odd, but they definitely know what they want.