The head injury thing is a big conversation right now because the players union sees it as a good opportunity to get money from the league. If they really care about player safety they should start by doing something to prevent all the devastating leg/knee/ankle injuries that happen in this game. Today I watched my team's first round draft pick have his leg snapped like a twig, but there have been so many others that have ended seasons and careers too. Everyone just shrugs and acts like that's no big deal though.