Crosby has been out since December 5 due to concussion-like symptoms and was also diagnosed with a soft tissue injury in his neck last week.
However, he did state on Monday that he is feeling better, but is still not sure when he will return to play.
"I feel like this week's been good," said Crosby. "I feel like I'm getting there. "I don't have a timeframe, I wish I did but I don't. The good news is that there is some progression, with this stuff that's always what you're looking for."
Crosby, 24, missed more than 10 months after suffering a concussion last January and only returned to action November 21. In eight games this season, he has two goals and 12 points.
The Pens also said on Monday that center Jordan Staal and defenseman Simon Despres both returned to practice.
Staal has been out since January 6 with a knee injury and Despres has also been out with a knee injury.