"You always want to get progress," Lehkonen said. "Now the bounces are going my way, so that's a good thing."
The Sabres had an opportunity to tie the game with 1:06 of 5-on-3 power-play time in the third period when Nikita Scherbak (5:58) and Lehkonen (6:53) were each called for tripping, but Buffalo got two shots on goal during the two-man advantage.
"If you look at the percentages, the teams that score on their 5-on-3s usually have good success," Sabres coach Phil Housley said. "That was a perfect time for us. Lack of execution, lack of sticking with the game plan as far as what we're looking for at 5-on-3. Some guys like to put things in their own hands and think that's going to work. Well, it hasn't."
Byron scored an empty-net goal with 1:15 remaining in the third period to make it 2-0, and Gallagher scored into an empty net with 44 seconds left for a 3-0 lead.