The Bruins have given a tough update about one of their important forwards.

Boston Bruins head coach Joe Sacco shared with reporters that forward Mark Kastelic will not be in the lineup for the club's Tuesday contest against the Tampa Bay Lightning.

Kastelic, 25, suffered an upper-body injury near the end of the Bruins' Jan. 9 matchup against the Lightning and missed the team's last game against the Florida Panthers. Now, he will be out for his second straight game, which is less than ideal for the Bruins.

Kastelic has become a major part of the Bruins' bottom six, and it's why he earned a three-year extension earlier this month. In 43 games this season, the 6-foot-4 forward has four goals and has set new career highs with eight assists and 12 points. He also has given the Bruins a lot more bite, as his 81 penalty minutes and 167 hits show.