What's up with Ed Reed?

It will be interesting to see what Ravens Pro Bowl safety Ed Reed decides during the offseason. He missed at least four tackles in the Bengals game yesterday, and it's apparent he is dealing with some type of arm, shoulder or neck injury. He's basically playing with one arm, and isn't quite as effective as in the past. Can the injury be corrected with some type of surgery? I don't know, but it's apparent Reed has to do something.