Bonucci has been very good this year. He makes the occasional mistake, but not often at all, and seriously, what defender doesn't make mistakes? Bonucci had one very bad year for mistakes, but for the most part he has been very good 3 of the last 4 years. People though turn 1 year of bad mistakes and try to make it seem as though he has been awful for 4 years. Anyways, the back 4 seems to suit him well. Ogbonna also. The two of them have impressed me this year. Chiellini on the other hand, he's been terrible.