NJ is made of glass, as we all know.
he can't play every single game, we gotta protect him somehow, and they haven't made injury-repellant uniforms yet.
Why don't we just play him on the days he doesn't get hurt, and skip the days he would get hurt?
My real point is that his injuries don't appear to be caused by fatigue or being worn down via excess playing time. Rather, they are flukish in nature, and thus bench time will have only modest and totally random impact on reducing his injury risk.