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Kyle Williams missed the 49ers last regular-season game because of a concussion. Given his history, he was no doubt informed along the way of the dangers posed by just one concussion, let alone the compounding effect of each one after that. The Giants knew that, too, and apparently went after him anyway. Unsettling as that seems, it’s a little late in the game for anyone to feign surprise.

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Jim Litke is a national sports columnist for The Associated Press. Write to him at jlitke(at)ap.org and follow him on Twitter.com/JimLitke.