Tim Thomas  faced six shots and stopped five as Nicklas Backstrom beat the veteran goaltender on a one-timer in front of the net midway through the period.
With teammate Tuukka Rask  in sweats up in the press box halo looking on, Thomas looked solid, if not spectacular in his first preseason action this fall.
The Bruins managed just five shots on Capitals netminder Dany Sabourin.
The highlight of the period came two seconds in when Bruins center Gregory Campbell  dropped the gloves with Capitals center Matt Hendricks. Just 24 hours earlier, Cambell got into it with Alexander Ovechkin as the two exchanged pleasantries at the Verizon Center .
Ovechkin cross-checked Campbell, who later came back at Ovechkin with a hard hit into the boards. The rough stuff continued and escalated in the third period.
Ovechkin didn’t make the trip so Hendricks was the stand-in and delivered the message at the earliest possible moment – the opening face-off.
As for the most anticipated talent in these parts since Joe Thornton , Tyler Seguin  centered the line with Blake Wheeler  and Michael Ryder . He played 5 minutes, 13 seconds and didn’t get a shot on goal. He was on the ice for the Backstrom goal and finished the period with a -1.