Coach Mike Tomlin called the damage to Burress' shoulder "significant" but declined to specify the exact nature of the injury,
Al Horford Jersey. ESPN and NFL.com reported Burress has a torn rotator cuff.
Burress landed awkwardly while trying to haul in a pass over cornerback Da'Mon Cromartie-Smith near the end of Thursday's practice at Saint Vincent College. The 35-year-old Burress remained bent over on the ground for several moments before getting up and walking to the sideline. He was carted off the field and sported a sling over his right shoulder late Thursday evening.