5-stars don't redshirt - it may not be unprecedented, but I can't think of anyone off the top of my head that has done so. They do transfer on a semi-regular basis, though, between the likes of Derryck Thornton, Marcus Lee, Malik Newman, Austin Nichols, Kyle Wiltjer, Rodney Purvis, Jabari Brown, Dorian Finney-Smith and others. I think asking a five-star recruit to redshirt is kind of a slap in the face. Kind of like saying, "Yeah, you'll be a nice player in a couple years, but you won't be a main cog in the immediate future." If they're not a main cog, they will go to a place that serves a bigger role for them.