Can't believe no one has posted this yet, so I thought I would throw it up.
Myself, I have a tough time believing it, and don't consider McCown a rock solid source. If it were Bob McKenzie or Darren Dreger, then I might be very worried.
Pat Brisson, Sid's agent has denied it and stated that Sid is getting better.
Hopefully just a ploy for press, if this somehow came true then it would be one of the most tragic examples of a career cut short that hockey has ever seen, surpassing the likes of Cam Neely, Eric Lindros and even Bobby Orr.