Summary — Both the Capitals and Bruins had wrapped up their playoffs seeds by the time the pucked drop for the regular-season finale on Sunday, so Washington was playing for a season sweep of Boston. The Capitals were not able to complete the brooming of the Bruins, as Boston took a 4-3 shootout win. David Krejci  and Miroslav Satan scored two the Bruins two goals in the shootout while Tim Thomas  stoned the Capitals in the extra-extra frame to seal the victory. Thomas got the start for Boston and made 34 saves in the win while Semyon Varlamov stopped 35 of shots in the loss for the Washington.
The score was tied at two in the third when the Capitals took the lead at 9:59 when former Bruin Mike Knuble had a tip-in off of a Mike Green  shot to temporarily give Washington the lead. Boston came back within the five-minute remaining mark when Krejci fed Marco Sturm  for a one-timing, game-tying strike at 15:42 to eventually send the game to overtime and then the shootout.
The Capitals got on the board quick when Alexander Semin beat Thomas with a snap shot at from the wall side of the left circle that had eyes to the back of the net at 2:23 in the first period.
Boston came back. Michael Ryder , who had scored one goal since Feb. 13, netted two in the first period to pace the Bruins attack. The first was a nifty feed from behind the net on a backhand pass by Milan Lucic  that Ryder wristed back across Varlamov to tie the game at one. The forward would strike again at 14:55 for his 18th of the year to make it 2-1 when he struck on a wrist shot high far-side across Varlamov on the power play. It was the Bruins first goal on the man-advantage in their last 23 opportunities.
The lead would not last long, as Eric Belanger tied it 19-seconds later on a wrist shot passed Thomas at 15:14 to make it 2-2. That’s the way the score would stay until halfway through the third period.
Michael Ryder — The much maligned Bruins forward got out of his scoring funk with two first period goals to give him 18 for the season.
David Krejci– Set up Sturm for the game-tying goal late in the third and scored the game-winner in the shootout.
Mike Knuble — The former Bruin forward got the game-winner with his 29th of the season on a tip-in off the stick of Mike Green in the third.
Turning Point — The teams had been spinning wheels until well into the third after the first period flurry of lamp lighting. It looked like the Capitals would walk with the clean two points when Knuble had the deflection goal off the stick of Mike Green as Brooks Laich was tackled in front of Thomas for an effective screen. But Krejci did his work where he does it best, on the half wall by the circle, and fed Sturm in the slot right where he was able to wind up and send a screamer passed Varlamov to tie the game.
Key Play — Krejci and Satan teamed together to put the Capitals away in the shootout. Krejci scored first in the second round and did to stick fakes right in front of the crease before going wide right to put the puck through the corner around Varlamov’s skate. Thomas stoned Matt Bradley in Washington’s second round setting up Satan to end it with a score in the third. The Slovak did a rush, hesitate, rush move to get Varlamov way out of position sweep it passed him for the victory.