Kelly/By S. Bradley

Bruins general manager Peter Chiarelli continued to lock up members of his 2011-12 club by re-signing two key centers Monday, according to a Tweet from TSN reporter Bob McKenzie.

Chris Kelly (four years, $12 million) and Gregory Campbell (three years, $4.8 million) have re-signed with the club less than a month before they were scheduled to become unrestricted free agents.

With these signings, the Bruins now have 12 of their 14 forwards from last season’s postseason roster under contract for 2012-13. Only Benoit Pouliot and Brian Rolston are still scheduled for free agency.

Kelly, an alternate captain last season, set career highs in goals (20) and points (39). Campbell produced 16 points (8 goals) and one Gordie Howe hat trick in his role as fourth-line center. Both Kelly and Campbell have been key components of Boston’s successful penalty kill the last couple years.