For the month of March, the Penguins couldn't lose.

For more than three weeks, opponents couldn't manage more than two goals, if they could get one at all.

But several of the team's streaks came to a screeching halt Tuesday night in a 4-1 loss against the Buffalo Sabres at Consol Energy Center.

Gone is the winning streak, at 15.

Gone is the team's record shutout streak, at 218 minutes, 48 seconds.

Gone is goaltender Tomas Vokoun's personal- and franchise-best shutout streak, at 173:06.

In fact, Vokoun was gone before the midpoint of the second period, pulled for Marc-Andre Fleury after the Sabres built a 4-1 lead in what was the final game of the Penguins' five-game homestand -- longest this season.

Their 15-game streak was tied for second longest in NHL history.

The 1992-93 Penguins' run of 17 wins in a row stands safe as the league record.

"We had that 17-game mark that we were so close to getting. It's disappointing to lose," said Fleury, who stopped all 16 shots he faced and said he felt good physically in his first appearance since he left a game a week earlier because of a neck injury.

Special teams helped to decide this one.

The Penguins gave up a short-handed goal and scored a power-play goal. That could be considered a wash, but it was the minutes that were eaten up subsequently while they killed all five Sabres man-advantages that thwarted a comeback.

"The penalty kill can give you momentum, but, when you have several in a row, it can kind of drain you," Penguins defenseman Matt Niskanen said. "You lose a little steam, and it's tough to get some offense going.

"That's one aspect, but, all in all, we just weren't very good. The execution was poor. Battle level was poor."