Ahead of the NHL resumption in 2005–06, Thornton became a restricted free agent in summer 2005. Negotiations on a new contract were strained: Thornton was reportedly unhappy with the state of the Boston Bruins franchise, and upset with criticism of his play in the Bruins' early playoff exit in 2004. He was under heavy scrutiny for his leadership style and was criticized for not raising his level of play during the playoffs. Nevertheless, Thornton re-signed with Boston on August 11, 2005, to a three-year contract worth US$20 million.