Treyson already redshirted, so he's a sophomore
Hillstead still has a redshirt, which would be good for him
Those two are the next 2 after Bohannon and Retzlaff. The coaches have been mum about which one would come in as QB3.
Enoch Watson is on a mission and is a good prospect.
Barring another signing, I think Hillstead will be QB2 next season. The coaches took him because he's an upgrade to their QB room.
Lugo and Hagen are both a long way from seeing the field. They would only get there through attrition and great off seasons.