The NHL and NHLPA have agreed to mandate full vaccinations for all players and staff that work in hockey operations. The full wording is in the article, but failure to comply will result in suspension away from the team, exclusion from travel and games, and loss of pay for every day they are not in compliance with the rules.
There are exceptions, including “sincerely held religious beliefs,” but those players will be heavily restricted from going anywhere beyond the arena, team hotel, and practice facility. “[Unvaccinated players] are not allowed to use the hotel gym, pool, sauna, steam room or other shared facilities.