It is for the same reason, imo, the Texans drafted Tate. Slaton had his neck fused together. There is a ton of risk.
Here is a links to the issue from ESPN's Stephania Bell:
http://espn.go.com/blog/afcsouth/post/_/id...or-a-compliment
ESPN's resident physical therapist Stephania Bell weighs in on Steve Slaton.
The good news for Slaton is that he woke up feeling better immediately. Not everyone does. What that does seem to indicate is that this was certainly the problematic area and that pressure relief around that nerve root had an immediate impact. That is very good news for his prognosis (however not a guarantee that symptoms won't return).
That said, fusions are a serious matter. Even with advanced techniques, it's worth remembering that surgery requires going deep into the neck to access the vertebrae -- and there are very delicate structures right nearby -- the spinal cord and all of the nerves that exit out toward the arms. No one enters into this surgery lightly. (Sidebar: that makes Peyton Manning's recent surgery serious no matter how lightly it's being treated -- when you talk about the spine, it's not like doing a routine knee scope.)
Back to Slaton: We are supposed to have movement between each vertebral segment, not only for normal motion but it helps disperse the load of weightbearing borne through the head and neck. When you fuse a segment, the other segments above and below necessarily have to compensate some for that new stiff segment. This can mean that down the line, you can have problems (hypermobility or too much movement) at adjacent segments as they are naturally subject to more stress and strain.
Also, with a running back, the concern relates to the type of hits they take, often putting their head down and leading with their shoulder to gain extra yardage. It may be one of the reasons we see them suffering concussions more often when they collide with would-be tacklers. Any axial (meaning vertical through the head and neck) load is going to be potentially more threatening to an athlete who has a cervical fusion. Not necessarily in a quantifiable way, and there are a number of variables at play, but the bottom line is that the neck is not as adaptable to those loads, simply because of the history.
Running backs can also suffer stingers when they take a big hit to the neck or shoulder that either stretches the neck away from the shoulder or jams it toward the shoulder. Knowing there is a history of nerve irritation and potentially a less mobile cervical spine (neck), etc., a stinger may be more problematic following this type of injury.
He will need to work diligently to strengthen the stabilizing muscles around his neck (very deep muscles) as well as all the muscles in the upper back that help support the neck. While he can very well be cleared to return -- and he can indeed go on to have success and not have another major incident -- there is inherently more risk, simply because of what he has been through. -- Stephania Bell