Spezza was injured in the second period Thursday night on a hit by Avalanche defenseman Francois Beauchemin after scoring earlier in Dallas' 4-3 overtime victory. He was placed on injured reserve Friday and there is no timetable for his return.
The 32-year-old is third on the Stars with 18 goals and tied for fourth with 40 points in 52 games. He is tied for the team lead with five game-winning goals.
The Stars called up forward Radek Faksa from the Texas Stars of the AHL on Friday. The 2012 first-round pick has 26 points (15 goals, 11 assists) in 28 games for the Stars' top affiliate.
Dallas plays host to Chicago on Saturday night.
This story has been corrected to show that Dallas plays Chicago on Saturday night, not Friday.