That was my understanding as well, Indian. The McKenzie's wanted their son to participate in the Nike summer camps, something DLS frowned upon.
I believe DLS will need bigger lineman soon if they wish to continue to compete at the top level (aka State and National). It seems this year's DLS team had fewer lineman playing both ways, a sign perhaps that smaller lineman will wear down against the SJB's and Mater Dei's over the course of a game.
And the DLS O Line looked small this year.
All linemen wear down, big and small. My understanding regarding Khalil was DLS was ok with him competing at camps, they just didn't want him doing the one-on-one contact drill, which is the "shashimi" of camp for a lineman. The very best part.