Bishop Dunne is a private school and has a powerhouse football program. The problem is their competition is really weak.
Many Bishop Dunne players are on "scholarship"...with many having transferred from Deion Sanders' former Primetime Academy. I don't know if Robertson is one of the former PTA players, but I would not bet against it.
I have seen Dunne play on a couple occasions. They have some players. I didn't pay attention to names, but their WR's and DE's stood out.