sentences:  After ten seasons with the Blues organization and leading the club as captain for the last five seasons, Backes left as a free agent after the 2015–16 season.Backes agreed to a five-year, $30 million deal with the Boston Bruins on July 1, 2016.On November 22, 2016, the Bruins as a team reached the milestone of 20,000 goals all-time in NHL play, dating back to their 1924–25 debut season when left winger Smokey Harris scored the Bruins' first-ever goal on December 1, 1924; Backes' power play goal for the Bruins got them to the 20,000th-team goal total plateau in a 4–2 home rink loss to his previous team, the St. Louis Blues.