Mathis, one of the top interior linemen in the state, showed his stuff and came away feeling good about his performance, but got nicked up in the process.
"I did great, I had a great outing but I hurt my shoulder a little bit, so I had a little minor setback right now, but I'm OK, I'm icing it and it's healing real quick."
Mathis said his work with offensive line coach Dan Roshuar made him feel good.
"He liked me a lot, he said just lose a couple more pounds, I've already lost 15 pounds, he said lose a little more and get down to about 290 and I'll be fine."
"Last year, I did pretty good, I don't feel I had the best year that I could have had. I think the team overall, we overachieved, we only had four or five seniors so we have the experience and I think we're going to do great this year.
Mathis said he would love to have Nicholas Perry, formerly of Detroit Mackenzie which is scheduled to be shuttered, join him at Crockett, but says "everybody's after him."
GSN will keep tabs on this talented pivotman as he looks for offers and narrows down his college of choice.