Ullmark's injury occurred during the third period of a loss to Ottawa at KeyBank Center. The goaltender was following the action behind his net when his left skate appeared to collide with the post, forcing him to fall awkwardly on his right leg.
Krueger said the coaching staff felt pleasantly surprised by how sharp Ullmark looked in his first practice back. Ullmark said he felt better than expected, though not 100 percent. He was particularly enthused about being back around his teammates after being separated through the first three stops of their Western Conference road trip.
"I think that's the biggest thing for me right now is just to be around the guys, socializing," he said. "When you're injured, you're kind of in your own bubble trying to work on things you need to do to get back as soon as possible so you don't really hang around with the boys anymore. So, that's one of the things that I really do enjoy doing."
Ullmark had started 18 of Buffalo's last 20 games prior to his injury. He's posted a .914 save percentage in 33 games this season and his 16 wins are a career high.
"He just developed a calm and a confidence trusting, number one, his positional play, especially off breakdowns and second chances," Krueger said. "He just stayed strong and solid and calm and we loved that about his game.
"We need to just find that back really quickly because it was that combination of being aggressive in the right moments but also understanding when he needed to just use his size and his positional play to defend. He looked really good in practice today, I have to say."