The Bruins added Taylor Hall, right, to their COVID list on Saturday and the team won't play again until after Christmas. (AP photo)

The NHL shut down the Boston Bruins and Nashville Predators through Christmas on Saturday, bringing to five the number of teams in COVID-19 limbo. Weekend games for the Canucks and Maple Leafs also were postponed as the league tries to control a spiraling outbreak in its locker rooms.

The NHL and its players association agreed to daily testing and other enhanced protocols to slow the spread of the coronavirus. They will take effect immediately and last at least through Jan. 1, with an evaluation no later than Jan. 7.

Boston’s game last night vs. Montreal and next Thursday’s home game vs. Colorado had already been cancelled; Sunday’s game at Ottawa and Tuesday’s game at TD Garden vs. Carolina were added to the list on Saturday, shutting the team down.

“Given the increased number of positive cases in our league within the last two weeks, and changing societal realities with the new omicron COVID-19 variant, the NHLPA and NHL have collectively agreed that all Clubs shall be required to follow enhanced preventative and detection measures,” the league said in a statement.

The Bruins and Predators join Calgary, Colorado and Florida, which already had been shut down through next week because of outbreaks. Saturday night’s game between Toronto and Vancouver and Sunday’s Arizona-Vancouver and Toronto-Seattle games were also postponed amid worsening conditions across North America due to the omicron variant of the coronavirus.

Approximately 70 players — 10% of the league — are in the NHL’s COVID-19 protocol and the number of games postponed this season has climbed past 20. Several Canadian provinces are now or will soon limit attendance at large events like NHL games to 50% of capacity.

Besides the daily testing for players and coaches, the league said “additional pre-game testing may be implemented, on a case-by-case basis, when a COVID outbreak occurs within a team.”

Moments after the announcement, Detroit placed three players, coach Jeff Blashill and assistant coach Alex Tanguay in the protocol ahead of Saturday night’s home game against New Jersey. The Red Wings have the only player in the league, Tyler Bertuzzi, who is not vaccinated.

The Bruins’ COVID-19 list grew to nine players on Saturday when Taylor Hall and Curtis Lazar were placed in the protocol. The team said it has closed its training facilities.

“The Bruins, Predators, Maple Leafs and Canucks organizations have followed, and will continue to follow, all recommended guidelines aimed at protecting the health and safety of their Players, staff and communities at large as set by the NHL, local, state/provincial and federal agencies,” the league said in a statement.

Toronto coach Sheldon Keefe was added to the protocol Saturday along with defensemen TJ Brodie and Travis Dermott, goalie Jack Campbell and assistant coach Spencer Carbery on the protocol list Saturday. Players John Tavares, Alex Kerfoot, Jason Spezza and Wayne Simmonds were placed on the list Friday.

While postponed games may be rescheduled, all eyes on are the calendar: The NHL plans to allow its players to participate in the Winter Olympics in China in February — unless COVID-19 disruptions prove to be too much.

The NHL has until Jan. 10 to opt out of the Winter Games without financial penalty, but it retains the right to cancel its plans up until players are scheduled to travel to Beijing.