Ruff, who is fifth in NHL history in games coached, spent 15 seasons as coach of the Buffalo Sabres (1997-2013), leading them to the Stanley Cup Final in 1999, and four with the Dallas Stars (2013-17) before he was hired as an assistant by the New York Rangers on July 10, 2017. He then spent three seasons in New York before he was hired by New Jersey to replace Alain Nasreddine on July 9, 2020.
Ruff won the Jack Adams Award as NHL coach of the year in 2005-06 and was runner-up to Alain Vigneault of the Vancouver Canucks in 2006-07, when Buffalo had the best season in its history (53-22-7, 113 points).
Devils associate coach Andrew Brunette, who was hired by New Jersey on July 15, has enjoyed his time with Ruff this season. In particular, he respects the way in which Ruff deals with pressure and interacts with the players.
"The way he sort of delivers his message day to day I think is pretty powering because you can feel his passion," Brunette said. "He mixes it in with how much he kind of loves his players. I think he manages both sides of that, where he's demanding but also rewarding."
Said Devils forward Miles Wood: "Lindy knows how to get the best out of his players. He knows each players' personality extremely well and knows how to poke at you to get you going. Guys love playing for him because he knows when to joke and when to be serious, and he knows how to win hockey games."
As a player, Ruff, who was selected by Buffalo in the second round (No. 32) of the 1979 NHL Draft, had 300 points (105 goals, 195 assists) in 691 regular-season games for the Sabres and Rangers, and 24 points (11 goals, 13 assists) in 52 playoff games.
"Sometimes we'll have those hard practices and other times we'll have a practice that's more recovery base," Devils forward Dawson Mercer said. "I love when we have the gritty, hard type of practice. I'm kind of old school in that regard, but I'm a smaller player, so I like the newer style. I'm a mix of it all and Lindy provides that."