I see it two ways! There are a lot of degenerative findings that do come with age. There are bone growths that come with time, so it could not have happened overnight or within a few weeks to that degree of severity.

However the C5-6 Disc seems to be a major problem here (there are other's as well) and that most certainly could have been the product of a fall, as any of them could have been.

The work comp doctor works and gets paid by work comp. His best interests are their best interests. You have the right to seek your own physician if you do not like or agree with his assessment. Like I said it can be spun both ways!

Best of luck!