So... I've seen Illinois do this the whole Tourney, it feels illegal, but never gets called.
Either Illinois big guy does this; in the paint looks like he is fighting for position, but then the guard starts streaking in the lane. The center brings arms down, makes kinda a cage around the defender, and does what I would call a moving screen to keep the other teams big from being able to slide over and help defend.
And they do it all the time. It's Never called. My question is this legal, and if so why doesn't everyone else do it?