General Manager Don Sweeney announced on Friday that the Bruins and Kastelic have agreed on a three-year extension at an average annual value of $1.567 million. It runs through the 2027-28 season. Kastelic would have been a restricted free agency after this season.

Acquired from the Senators as part of the Linus Ullmark trade in the offseason, Kastelic has made an immediate impact in Boston.

Mark Kastelic has brought the requisite amount of sandpaper to the Bruins’ lineup and, on Friday, the club rewarded him for it.

Boston Bruins general nanager Don Sweeney on Friday announced an unexpected transaction as the team has signed forward Mark Kastelic to a three-year contract extension which will carry a $1.567 million AAV until the 2027-28 season.

The Boston Bruins have signed forward Mark Kastelic to a three-year contract extension. Starting next season, the gritty forward will carry a $1.567 million cap hit.

Bruins forward Mark Kastelic was eligible to reach unrestricted free agency in July, but he's staying in Boston with a new contract extension. The team announced Friday it has signed Kastelic to a three-year extension with an annual salary cap hit of $1.

The Boston Bruins have announced that they have signed forward Mark Kastelic to a three-year, $4.701 million contract extension on Friday. The contract will have an average annual value (AAV) of $1,567,

The Boston Bruins signed forward Mark Kastelic to a three-year contract extension with a $1.567-million cap hit, the team announced Friday.Kastelic has four goals and 11 points in 39 games this season.

The Boston Bruins are rewarding Mark Kastelic for his gritty play this season. The six-foot-four forward has signed a three-year extension with an average annual value of $1.567 million, the Bruins announced Friday.