Crosby is expected to be through the infectious period of the disease by Monday, according to Penguins team doctor Dharmesh Vyas. He will continue to be monitored daily and could return next week.
"It's a disease that's going throughout the League and you just don't know how far it can spread," Penguins general manager Jim Rutherford said. "We're watching this on a regular basis."
During a game against Carolina Hurricanes on Nov. 28, Crosby sustained an injury to the right side of his neck. He injured a gland and underwent a CT scan, which showed the injury, Vyas said.
The Penguins medical staff tested Crosby for mumps and his results came back negative at that time, Vyas said. Crosby was placed on medications to allow for the swelling to dissipate and once he was taken off of medications, he developed swelling next to the area of his injury.