David Krejci also had two assists and Tuukka Rask made 21 saves for the Bruins in their third straight shutout of the Flames in Boston. Rask picked up his third shutout of the season and extended Calgary's scoreless streak in Boston to 189 minutes, 36 seconds.
Reto Berra kept Calgary close, stopping 29 shots as the Bruins controlled play most of the game.
Boston outshot the Flames 31-21 one week after rallying for a 2-1 win in Iginla's return to Calgary, where he played 16 seasons and spent nine as the team's captain.
It's cool when you think about how many great American players have played the game and the two players that were at that 18-game point streak and what they've done in their careers. It's pretty cool right now, but it was kind of overshadowed by the loss.
— Blackhawks forward Patrick Kane after breaking the record for longest point streak by an American-born player with a goal and an assist in a 3-2 overtime loss against the Kings