Chain gang member hurt during Saints-Lions game suffered dislocated knee
I will give a little insight on how these guys get these "jobs". I did it at the college level for a short time. Just like when I officiated high school football, you are an independent contractor. The guy that got hurt gets paid by the NFL but is not an employee of the NFL.
When I went to the dome to officiate a high school championship, I got a tour with a guy that run the clock at Saints games. He told me how it works there. This guy that got hurt probably officiates high school in the New Orleans area. They are usually older guys because they are typically able to be off on Sundays.
So the NFL may pay his dr bills, but not obligated too.