Zdeno Chara said the PCL in his left knee is permanently torn.
Zdeno Chara was hobbled by another shot on Wednesday.
Zdeno Chara is expected to play Wednesday after he returned to practice on Tuesday.
Zdeno Chara blocked a shot with his left ankle on Saturday, but he was able to finish the game.
Zdeno Chara skipped Monday's practice for maintenance, according to coach Claude Julien.
Zdeno Chara scored a goal in Sunday's 5-3 loss to the Tampa Bay Lightning.
Zdeno Chara scored a goal in Saturday's 2-0 win over Pittsburgh.
Zdeno Chara scored a goal in Boston's 3-2 overtime win over Philadelphia.
Zdeno Chara scored on the power play and assisted in the Bruins’ 4-1 win over the Coyotes on Saturday night.
Zdeno Chara scored his fourth goal of season to put the Bruins up 2-0 in the first period, but the lead would evaporate in a 4-3 overtime loss in Calgary.
Zdeno Chara did some skating over the All-Star break to keep himself in shape.
Zdeno Chara registered two assists in Saturday's 3-1 win over Philadelphia.
Zdeno Chara scored his third goal of the season in Wednesday's 3-2 overtime win over Pittsburgh.
Zdeno Chara has displayed some rust since returning to the lineup from a torn posterior cruciate ligament in his knee.