There will be more trades as teams build toward a Stanley Cup run or make moves for their long-term future. Here are key dates to watch: the holiday roster freeze in December, the league's break for the 4 Nations Face-Off in February and the trade deadline in early March.

CALGARY -- Anthony Mantha will have surgery on his ACL and miss the rest of the season, the Calgary Flames announced Monday. The 30-year-old forward had seven points (four goals, three assists) and was plus-6 in 13 games in his first season with the Flames after signing a one-year, $3.5 million contract July 1 as an unrestricted free agent.

Mantha signed a one-year contract with Calgary in the offseason and is set to become a pending unrestricted free agent this summer. His injury not only impacts the Flames’ lineup but also complicates any trade plans the team might have had for him.