The Penguins (24-11-4), who entered Tuesday second in the Metropolitan Division, are 14-5-3 without Crosby. They have won three games in a row, seven of eight and 10 of 12.
"The team's playing unbelievable," Crosby said. "For the last however long, even prior to when I got hurt, I think guys going down left and right and we still find ways to win. That's been great to see. I'll be back as soon as possible."
Crosby has 17 points (five goals, 12 assists) in 17 games.
"It's always a good sign when a guy joins the team for a practice," defenseman Kris Letang said. "He looked good. So it's encouraging."
Evgeni Malkin has become the first-line center in Crosby's absence, primarily playing with left wing Jake Guentzel and right wing Bryan Rust. He has 15 points (five goals, 10 assists) while having at least one point in each of his past nine games, a stretch that was interrupted by missing two games with an illness on Dec. 12 and 14.
Guentzel, who leads the Penguins in goals (20) and points (43), is expected to miss 4-6 months after having shoulder surgery Tuesday. After getting his 200th NHL point on a goal at 6:55 of the third period in a 5-2 win Monday, Guentzel tripped over Ottawa Senators defenseman Thomas Chabot and fell awkwardly into the boards.
The 25-year-old forward has mostly played on the first line with Crosby at center through his first four NHL seasons. He was named Monday to the Metropolitan Division team for the 2020 Honda NHL All-Star Weekend.
Pittsburgh is already without third-line center Nick Bjugstad (core muscle surgery), and defensemen Brian Dumoulin (ankle surgery) and Justin Schultz (lower body). Letang and forwards Jared McCann, Alex Galchenyuk, Patric Hornqvist, Malkin and Rust have returned from injuries through 39 games this season.
"I've always been a believer that this is a players' game," coach Mike Sullivan said. "The players are the guys that get it done. This group of players here deserves a lot of credit to this point."
The Penguins did not hold line rushes Tuesday. It hasn't been disclosed how the lineup would change with Crosby and Guentzel each out Thursday.
"The way everybody has stepped up, whether it's [Guentzel] or [Rust], or [Malkin] ... guys that know that they have to step up, they've done that," Crosby said. "But then there are other guys that have stepped up in different points. Whoever has been in the net has found a way to get big saves too.
"I think just seeing the collective effort that it's taken to this point, it's been great to see. You want to be a part of that."