Pietrangelo saw the Bruins were slow on a line change, so after quickly looking up, he put a high shot on Rask from the right face-off circle that handcuffed the goalie. The rebound dropped into the slot, and O'Reilly knocked it in in one motion after gaining inside position on Boston defenseman Charlie McAvoy, who had just come onto the ice.
"With the way it developed, we knew we were going to have something to the net with [Pietrangelo] coming down there," O'Reilly said. "I'm just trying to do what I can to get to that backside, and it just was a great bounce. It happens sometimes, and then you just try to throw it on the net."
The Bruins had to play with five defensemen for the final 36:53 because captain Zdeno Chara left the game after getting hit in the face by a shot from Schenn at 3:07 of the second period. He was on the bench for the third period wearing a full, clear face shield, but he was advised by doctors that he could not play.
Bruins coach Bruce Cassidy said he wasn't sure if Chara will be able to play in Game 5.
"With [Chara] out, the onus comes on us as a staff," Cassidy said. "You have [Connor] Clifton, McAvoy, [Brandon] Carlo, these kids are young. Torey's [Krug] been around, [John] Moore, but they're not old, grizzled veterans. So we have to coach them up. That's our challenge going into Game 5. We have to do a better job as a staff."