If you remember .. Bryce Thompson just showed up on campus before Fall camp started. He was committed to USCjr but did not sign with them on NSD. TN had already used all their 2018 spots so BT had to be a Blue Shirt and counted on the 2019 class.. So .. yes they DO use them on 4* players in this situation .. or he could not have gone on scholarship at UT.They don't blue shirt 4 star players.