My "unqualified" opinion (I do NOT work, nor have I ever worked, for the SSA) -- is this:

IF John doesn't have a high school diploma OR only has a high school diploma or GED, then, YES, he should apply. (College and/or skills training would be the "kicker" for his type of injury/condition, in my humble opinion.) His age just barely DOES help him. Of course being 55 or over would help more.

My suggestion would be that he STRONGLY document that he is IN PAIN and that IF he takes the pain meds to reduce the pain, he would possibly/probably endanger himself/others. (Read the little caution stickers on pain med bottles and you will see what I mean!) He would also need to get this documented by a doctor or other health PROFESSIONAL!!!

I'm gonna go and see if I can find anything in the SS Adult Impairments List to support my opinion.