Not sure when the finalized list goes out. The combine is usually the first week of January and the draft the following week or so.
Mata is a junior, so unless I missed something and he announced, he has another year. If he announced, participation in the combine isnt necessarily a good thing. Tulsa has had some cant miss prospects go there and ruin their pro contract chances. Tulsa has also had marginal players not be invited, drafted anyway, and end up making the club.