modern medecine is an inexact science, just like most modern humans are imperfect.
word is that sanders injury and surgery hasnt healed as quickly as anticipated so he had a procedure to draw bone marrow and injectit into the site to expidite the healing process.
surely the boot is for preventative measures. he is in the hands of some of the finest medical treatment in the world.
perhaps if there werent a lock out and he had received the medical coverage he had paid into, this wouldnt even be an issue 5 weeks before the season begins.