The Boston Bruins announced a series of transactions Tuesday, placing defenseman Charlie McAvoy and forward Mark Kastelic on Injured Reserve (IR), defenseman Hampus Lindholm on Long-Term Injured Reserve (LTIR) and recalling forward Matt Poitras and defender Michael Callahan from the AHL’s Providence Bruins.

BOSTON — Bruins interim coach Joe Sacco had plenty to sort out when he met with the media after morning skate ahead of Tuesday’s game against the Lightning at TD Garden. Two players were called up, two were placed on injured reserve and a third was moved from injured reserve to long-term injured reserve. Sacco explained:

The Boston Bruins will be without Charlie McAvoy due to an undisclosed injury. Joe Sacco has explained the situation but hasn't delved into what caused it.

Boston Bruins forward Mark Kastelic was on the ice again yesterday but isn’t ready to play just yet. Joe Haggerty: Bruins defenseman Hampus Lindholm was skating on his own for the second consecutive day.

Matthew Poitras is back with the Boston Bruins, but not under ideal circumstances. In addition to calling up Poitras and defenseman Michael Callahan from AHL Providence on Tuesday morning, the Bruins placed defenseman Charlie McAvoy and forward Mark Kastelic on injured reserve and moved defenseman Hampus Lindholm to long-term injured reserve.

Boston Bruins defenseman Charlie McAvoy is being shut down for a few games with a nagging injury, interim head coach Joe Sacco said Tuesday, per Boston Sports Journal's Joe Haggerty.The Bruins placed McAvoy on injured reserve amidst a flurry of moves.