Lee scored the other goal for Ottawa, while Nick Foligno had two assists.
Lane MacDermid scored for the Bruins, who got 34 saves from Rask.
MacDermid scored at the 7-minute mark of the second period and the Senators tied it just over a minute later when Lee beat Rask through a screen.
|Lane MacDermid (1) Snap shot - ASST: Shawn Thornton (1), Adam McQuaid (1)|
1 - 0 BOS
|Brian Lee (1) Wrist shot - ASST: Nick Foligno (1), Peter Regin (1)|
1 - 1 Tie
|Mika Zibanejad (1) Slapshot - ASST: Brian Lee (1), Nick Foligno (2)|
2 - 1 OTT
|Jared Cowen Elbowing - 2 min against Jordan Caron|
|Benoit Pouliot Holding - 2 min against Chris Phillips|
|Bobby Butler Too many men/ice - bench - 2 min|
|Brian Lee Interference - 2 min against Benoit Pouliot|
|Shawn Thornton Holding the stick - 2 min against Kaspars Daugavins|
|Andrew Ference Boarding - 2 min against Nick Foligno|
|Benoit Pouliot Boarding - 2 min against Brian Lee|
|Jared Cowen Slashing - 2 min against Patrice Bergeron|