NHL fines Stars $100K for violating CBA agreement with practice during Christmas break

"This team activity was in violation of Article 16.5(b) of the Collective Bargaining Agreement between the NHL and the NHL Players' Association," the announcement read. 

According to the agreement, "no club may request a Player's consent to practice on such days for any reason" on Christmas Eve, Christmas Day and Dec. 26, except if a game falls on the 26th.

Speaking to reporters before the game, head coach Pete DeBoer said the team "had an optional, and, of course, the young guys all show up for the optionals, like they're supposed to do."

Mavrik Bourque, Logan Stankoven, Wyatt Johnston, Lian Bichsel, Nils Lundkvist and Thomas Harley were among the players that attended. However, on Saturday, DeBoer described it as "voluntary ice" instead of a scheduled optional practice as he had initially said. 

Travel for games is also banned on the league-mandated break. The fine money will go to the NHL Foundation.

The Associated Press contributed to this report.