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.

When Mark Kastelic suits up every night, the Bruins know exactly what what they’re going to get from the rough-and-tumble forward. Now Kastelic knows what he’s going to get from the Bruins. The B’s announced on Friday that they inked the 25-year-old Kastelic to a three-year extension that carries an annual cap hit of $1.

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.

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.

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 Boston Bruins announced on Friday that they have signed center Mark Kastelic to a three-year extension with an annual cap hit of $1.567 million. Kastelic has been a perfect fit on the fourth line.