The kid is Derek Green. He was a 3 star out of high school but it was reported Ruffin McNeal thought he was very underrated. He enrolled in January but shortly after left the team and announced he was joining the military, then announced in February he was transferring to Vandy. Kind of a weird progression.
The DL coach is Calvin Thibodeaux. I don't know anything except what has been published but he doesn't have a record of running kids off. Two DL, Derek Green and Ron Tatum, left after Grinch was hired as DC and I have read these two don't fit his scheme.