It's been that way since Pittsburgh hired Sullivan one year ago, on Dec. 12, 2015, but something was different.
For the first time, Sullivan seemed unsure what to say.
"I don't know that I can put it into words, the experience that I've had so far with this group of players," he said. "I think this coaching staff is very grateful to have the opportunity to coach this group of players. … I don't know that I can articulate and give it its justice what this past year has meant to me personally."
The impact Sullivan has had on the Penguins during the past year, individually and as a group, has been clear. They've led the NHL by averaging 3.29 goals per game, 3.61 goals per game at home, and their 29 home wins are tied for the most in the League. They're second in the NHL with 51 wins and third with 110 points.
Penguins captain Sidney Crosby has led the League with 97 points in 74 games since Sullivan took over. His 1.31 points-per-game average is the best among players with at least 50 games, and teammate Evgeni Malkin is tied for third at 1.09 points per game (Edmonton Oilers center Connor McDavid is second at 1.19 points per game).
"I think the players tried to take responsibility and play better, but he's definitely kind of led the way," Crosby said of Sullivan. "He's shown what he expects of us right from Day 1 and he's gotten a lot out of us and I think that says a lot about the job that he's done."
Before Sullivan took over, Pittsburgh went 15-10-3 and averaged 2.36 goals per game in its first 28 games under Mike Johnston last season. Crosby, in particular, sustained a significant drop in production with six goals and 19 points in his first 28 games.
With rumors swirling regarding Johnston's job security, the Penguins defeated the San Jose Sharks 5-1 on Dec. 1, 2015. They then lost back-to-back games, 5-3 to the Los Angeles Kings on Dec. 5 and 2-1 to Anaheim Ducks the following day.
The Penguins finished the road trip with a 4-2 win at the Colorado Avalanche on Dec. 9, but lost 3-2 in a shootout to the Los Angeles Kings at home Dec. 11.
The following day, at 12:30 p.m. ET, Penguins general manager Jim Rutherford announced Johnston had been fired and Sullivan was promoted from coach of Wilkes-Barre/Scranton, the Penguins' American Hockey League affiliate.