Bruins right wing Mark Kastelic agreed to a three-year deal extension through the 2027-28 season with an annual cap hit of $1.567 million. During the trading season, many speculated that Bruins forward Trent Frederic could be moved before the NHL trade deadline. Meanwhile, Boston secured Kastelic to a long-term deal.

Boston Bruins leading scorer David Pastrnak left Monday night’s game against the Washington Capitals in the second period with an undisclosed upper-body injury and did not return.