Boston Bruins GM Peter Chiarelli announced Sunday that defenseman Johnny Boychuk suffered a slight fracture to his left ulna (bone in forearm) in the first period of the Bruins' 3-2 loss to the New York Rangers at TD Garden on Saturday.
Boychuk is expected to be sidelined for approximately four weeks.
Boychuk, who signed a two-year contract extension with the Bruins in June, has appeared in all six of the Bruins games this season, notching three assists. The 26-year-old was selected by the Colorado Avalanche in the second round (No. 61) of the 2002 Entry Draft.