Wounldn't it be the same as me? I'm on "sick leave" (back problems from pregnancy, which would be a non-work related injury) All I needed was a note from a doctor that said I was unable to perform the job I was hired to do.
The EI website says that you need to have accumulated 600 insured hours in the last 52 weeks or since your last claim.
They may make him look for work that he could do with his injury?
http://www.servicecanada.gc.ca/eng/e...cial.shtml#Who