PITTSBURGH -- The reigning NHL MVP is out indefinitely with an upper body injury. The league's top-scoring defenceman is out, too, apparently because of a lower body issue.
Still, it hardly matters for the streaking Pittsburgh Penguins.
Sidney Crosby scored his 13th goal, Joe Vitale added his first in more than a year, and Tomas Vokoun stopped 31 shots as the Penguins beat the Boston Bruins 2-1 on Sunday for their ninth straight win.
"It seems like it's always different guys, so that's what you need in order to have success consistently. We've been getting that lately," Crosby said. "Our depth is a big part of our success. We need to continue to show that."
The Penguins moved into the top spot in the Eastern Conference even without star centre Evgeni Malkin -- who missed his fifth consecutive game -- and played the final two periods without defenceman Kris Letang, who didn't return after the first intermission following a seemingly innocuous collision with Boston's Brad Marchand.
The Bruins took advantage of Letang's absence by spending most of the game's final 40 minutes working in Pittsburgh's end of the ice. Still, they had nothing to show for it thanks to the Penguins' suddenly responsible defence.
Taken to task by coach Dan Bylsma for sloppy play following a comeback win over Philadelphia on March 7, Pittsburgh has responded by allowing just five goals in five games.
Barely 24 hours after shutting out the New York Rangers 3-0 behind No. 1 goalie Marc-Andre Fleury, Vokoun showcased why the Penguins traded for him during the off-season to give Fleury an experienced backup.
Having guys in front of Vokoun who played smartly with the puck instead of trying to make the spectacular play certainly helped.
"They played pretty sound defensively, you've got to give them that, even though their top guys (were out)," Marchand said. "That makes it a little bit tough to play against, but we've got to find a way."
Tyler Seguin scored his 10th goal for Boston, and Tuukka Rask made 16 saves but couldn't stop the Bruins from losing to Pittsburgh for the second time in less than a week.
The Penguins scored three times in the final 7 minutes Tuesday to steal a 3-2 victory. There were no dramatics necessary this time as hockey's hottest team never trailed to remain unbeaten in March.
"Our team defence has been a focus for us and how we play, and it's everybody," Bylsma said. "The responsibilities of our forwards in the defensive zone has been a key for us both offensively and defensively. In the defensive zone we're six guys defending there."
Crosby nearly netted his most spectacular goal of the season midway through the first period with a breathtaking rush in which he split a pair of defenders and then attempted to slip a shot under Rask while falling to the ice.
Rask stuck out his right pad to make the save, leaving the NHL's leading scorer to flash a wry grin.
-- The Associated Press