Krug, 28, suffered an upper body injury in the team's win vs. Washington on December 23. The 5-foot-9, 186-pound defenseman leads all Bruins blueliners in scoring this season with five goals and 21 assists for 26 points in 33 games.
Kampfer, 31, has skated in four games with Boston and has also produced four assists in six games with Providence this season. The 5-foot-11, 198-pound blueliner has skated in 205 career NHL games, compiling 13 goals and 19 assists for 32 points with 106 penalty minutes.