The Bruins, not surprisingly, were feeling less pressure.
"It's nice we don't have to play against him four times a year," Boston coach Bruce Cassidy said.
"I'm curious to see who the third right [defenseman] is in San Jose. Is he going to get on the ice, poor guy? Burns and Karlsson, that's a nice 1-2 punch."
Bruins forward David Backes, who played his first 10 NHL seasons with the St. Louis Blue before signing with Boston as a free agent before the 2016-17 season, said he understands what Karlsson, who was drafted by Ottawa and played his first nine NHL seasons there, is going through.
"He had put his heart and soul into the team that drafted him," Backes said. "There's a personal side to the game. Fans with their fantasy rosters may see Player A switch teams to a team where he's going to have more success and be more valuable, but there is a family side and he's got a wife and a strong connection to the community in Ottawa. For me, I look more on the personal side.
"But yeah, I'm not mad to not play against Erik Karlsson in Ottawa anymore," he said.