I have been having conversations with Cameron Worrell for over a year now and they are one of the highlights of my week. But hearing him discuss his history with concussions and their lingering effects put the entire issue in context for me. We talk football during this chat – why he hates the Niners, Nate Collins, Kaepernick, defensive resentment in the locker room – but it’s the concussion discussion that makes this our finest twenty minutes.