The loss of McCabe would add another hole to the top of a defense corps already playing without Rasmus Ristolainen, who is working his way back from a severe bout with COVID-19. Krueger suggested Ristolainen could return "in a couple of weeks," though he stressed that the timeline is not definite.
McCabe and Ristolainen formed one of the NHL's most statistically consistent defense pairs to open the season despite routinely playing against opponents' top lines. To replace them will be a measure of the team's depth both on the back end and in the dressing room.
"Jake's a guy that, he's taken a lot of strides in the last couple of years as a leader and he's somebody I have a lot of respect for and all the guys have a lot of respect for in that room," said Kyle Okposo, an alternate captain along with McCabe.
"I don't know what the final prognosis is yet, but he's going to be a guy that's dearly missed on and off the ice. He does everything right. Blocks a lot of shots, he's there for guys, he's fought this year. I mean, he's just a high-character guy. He's gonna be missed for sure."
Will Borgen has established himself as a promising candidate to step up in the meantime, though he was absent from practice on Sunday to nurse an upper-body injury. His status for the team's game against the New York Islanders on Monday will be determined in the morning, Krueger said.
Borgen paired effectively with Rasmus Dahlin against the Devils, with the former's physical, defensive-minded style complementing the latter's high-skill game. Dahlin eclipsed 25 minutes of ice time in three straight games before skating 18:24 on Sunday.
"He's had to step up and play big minutes," Krueger said of Dahlin. "He's had to step up and play against the top lines of the other teams since the injuries and COVID in a way that he never did in his career, and yet he's doing well with it."
Here's how the team practiced on defense without Borgen and McCabe on Sunday:
26 Rasmus Dahlin - 33 Colin Miller
44 Matt Irwin - 62 Brandon Montour
88 Brandon Davidson - 10 Henri Jokiharju
Left-shot options in Rochester include second-year pro Jacob Bryson and rookie Mattias Samuelsson. Montour, Miller, and Jokiharju have all played on their off side at various points in their careers.
"We just have to make the best of it and try to compete," Dahlin said.