The BBC recently put together an hour long show in which they discussed the issue of concussions in sports. American football has been the most publicized sport when it comes to concussions, but soccer and rugby are two other sports that have seen greater discussion about the issue of concussions.
The program featured former NFL executive and agent Andrew Brandt and other individuals, but the most interesting for San Francisco 49ers fans would have to be team chairman John York. He shows up at the 50:45 mark, and I have transcribed his comments below. I did not hear the show live, but rather via this replay.