The cap rules really are screwing the Steelers in this instance, but it's the same set of rules for everybody. Count me among those who would be very nervous to see Shazier play again. Even if doctors clear him, you would think there would at least be some added vulnerability in his spine. Also, doctors can be wrong about a recovery. I had reconstructive foot surgery last June. The doctor kept telling me all was going well. Then she saw something she didn't like on an x-ray, which led to a CT scan. That revealed that an artificial bone graft on top of my foot hadn't healed like she thought and it fragmented. Painful, but not horrible. If something like that happened with a spinal injury, that could be disastrous. Also, as steelersrule already mentioned, Shazier would need to change the way he tackles. That injury wasn't entirely a fluke. It is the risk you run when you launch yourself at the opposition with your head down, something Shazier did far too often.