"He had a good practice," Sullivan said. "His status is the same. He's day-to-day."
McCann has been dealing with the issue for some time and the team decided to just take care of it before it becomes a prolonged problem.
"It was kind of a nagging injury that's been bothering me for a bit," McCann said. "I don't want it to bother me again. That's the worst thing in a professional hockey career, to have nagging injuries. We just have to focus on taking care of it. Our medical staff is unbelievable, and we caught it at the right time, which is good."
McCann, who only missed one game due to the injury, centered the team's second line between Dominik Kahun and Patric Hornqvist and worked with the second power-play unit. McCann will test it out on Friday morning before making a decision on playing.
"It's frustrating. I don't want to miss any games," McCann said. "I want to be out there helping the team."
Sullivan also clarified the situation with forward Alex Galchenyuk, who has been out with a lower-body injury.
"He had an allergic reaction and went to the emergency room on his own," Sullivan said. "He was treated for an allergic reaction. Our doctors have followed it. Those are the details that I know."
Sullivan also addressed a report that allergic reaction was due to a spider bite.
"It's not confirmed that it's a spider bite," Sullivan said.
The allergic reaction will not delay Galchenyuk's recover from the injury.
The Penguins are also missing forwards Bryan Rust (upper-body), Evgeni Malkin (lower-body) and Nick Bjugstad (lower-body). The team placed defenseman Juuso Riikola at forward in Wednesday's 3-2 overtime victory against Colorado.