The possibility of that is pretty high on the road since the team will travel to southern states where the Delta variant has run rampant. Florida, South Carolina, Texas, Missouri, Tennessee, Arizona, Nevada. If the Devils and Prudential don't put restrictions in their building, players from all of those teams will have an opportunity to pass the infection as well if they are vaccinated or not, but carrying it. As I understand it, the Prudential is not requiring proof of negative tests or vaccinations. Not to mention fans in every building including their own in other non controlled arenas. That's about half of the league at last count.
Any unvaccinated person is susceptible to infection from any person they come in contact with anywhere in their day to day life. He puts his whole team at risk as well. Vaccinated people can become positive and have no symptoms, slight symptoms, or actually get sick but very rarely need hospitalization. (This is a much lower possibility than unvaccinated people.). However, they do need to get away from others and recover. This guy subjects his team to that more than any vaccinated player does.
The crazy thing to me is that everyone is acting as if the vaccine makes you immune and it does not. It drastically reduces your chances and if you should contract it, as said above, less severe symptoms and a very rare chance of needing hospitalization and almost no chance of dying. This stuff can still end up taking out team members all around the league. If the horse gets out of the barn, look out.