Gregory Diulus of Vantage Management Group said Saturday that relatives are with Pryor at the hospital.
Allegheny County District Attorney spokesman Mike Manko confirmed Saturday that Pryor was the victim of a stabbing. Manko said he had no other information, including where and when the stabbing occurred.
Pryor, a former Ohio State quarterback, has played for teams including the Buffalo Bills, New York Jets, Washington Redskins and Cleveland Browns. He most recently signed with Jacksonville but was waived in September after a hamstring injury.