"There's always motivation when you're playing against friends and former teammates, especially the position we're in and what happened when we were there," Penguins captain Sidney Crosby said.
He said it was weird to go through his routine in the visitors' locker room but good to be back in Pittsburgh, where he spent 13 seasons.
Murray helped the Penguins to the franchise's fourth Stanley Cup and eventually grabbed the No.
Fleury knew his departure from Pittsburgh was inevitable last spring, but didn't want to become a distraction as the Penguins sought to become the first team in nearly 20 years to win back-to-back championships.
He won nine games and helped eliminate division rival Columbus and the Presidents Trophy-winning Washington Capitals before Murray returned in the third round of the playoffs against Ottawa.
"We tried to do what was best for the hockey team and Marc was just such a professional in how he handled the whole thing," Penguins coach Mike Sullivan said.
"From the start, expectations weren't too high," said Fleury, who earned his 390th career win Sunday to pass Dominik Hasek for sole possession of 13th place in NHL history.
- NHL on NBCSN: Wild look to put road struggles behind them in St. LouisNBCSports.com
- Flower power: Six facts as Marc-Andre Fleury makes Pittsburgh returnSporting News
- Why Pittsburgh loves Marc-Andre FleuryNBCSports.com
- Marc-Andre Fleury's bittersweet return to Pittsburgh, where fans will forever ...Tribune-Review
- 20 Penguins Thoughts: New deadline approach brewingPittsburgh Post-Gazette
- Penguins notebook: Team works to replace Marc-Andre Fleury's humorTribune-Review
- Live Blog: Fleury holding Penguins scoreless early in emotional return to ...Las Vegas Sun
- Penguins present Marc-Andre Fleury with 2017 Stanley Cup ringTribune-Review
- Could Penguins get booed for beating Marc-Andre Fleury? Team ponders crowd ...Tribune-Review