The Boston Bruins are listening to trade offers for center Pavel Zacha, reports . However, Boston would reportedly prefer to secure an extension this offseason for the 29-year-old, who has one year left on his contract with a $4.75-million cap hit. Despite looking to sign Zacha, the Bruins could opt to capitalize on a thin free-agent market for centers and have fielded calls for the Czech forward over the last week, adds LeBrun.