If all TBD posters had MRIs of their lumbar spine you would find a good amount of "bulging disks" in posters who had no back problems.
A bulging disk is only a problem if is bulging on a nerve root which causes pain and inflammation. You would think the Bills staff would know about this if it were the case.
The disk is in no way related to the heart, or absence of heart, as is the case with McCargo.
He won't be back in a Bills uniform because they don't want him, not because of his back, despite what the front office may say.
RTB