Is there any thing that the Pelicans can do to keep Zion safe?

It's already on Zion to make that possible.

Even the Pelicans can put Zion on load management to reduce the risks of being injured, what if at the time he decided to play, the injury happened? Aside from that, if the Pelicans, let's say have a hard time catching up with the standings next season to keep their playoff spot, they need all the help they can get and that includes allowing Zion to play no matter what.