It was originally announced as being on Fuller (7), but the official box score evidently lists it as being on Prosise (20), which makes more sense. Watching the replay, Prosise was probably being held as much as he was initiating contact, but tough to expect an official to catch the distinction in the heat of the moment. That was exactly my take. It looked to me like he was being held as much on the inside as he was just blocking the defender. That's a tough call to have cost you the game. I honestly don't think either one of the QBs will be any good in the NFL. Winston just has too much of that panic mode in him to be any good.