Per a league source, Burress has a torn rotator cuff in his shoulder. The injury happened Thursday after Burress hit the ground hard while trying to make a catch.
Burress, who turns 36 on Monday, spent most of 2012 looking for a job before signing late in the year with the Steelers, the team that made him a first-round draft choice in 2000. He re-signed with the Steelers for another year, and he was expected to serve as a large target for quarterback Ben Roethlisberger, especially in the red zone.
Read more on Pro Football Talk