Surgery is not required initially, but the shoulder will not be re-evaluated for another three to four weeks. The earliest he could return is November 10th against the Ravens.
The injury occurred when Griffin was tackled with under four minutes to play in Philadelphia. Eagles cornerback Jalen Mills landed the tackle that caused the injury. RGIII did return for the final three plays of the game, handing the ball off each time.
Another major injury suffered on Sunday was Chargers wide receiver Keenan Allen in a tough overtime loss to the Chiefs. Allen suffered a torn ACL in his right knee and will miss the rest of the season.
The receiver will be placed on injured reserve, as the team will use that vacant roster spot to activate defensive end Joey Bosa from the exempt list.
This is the second consecutive season that is cut short for Allen, as he went down in week 8 with a lacerated kidney in 2015.
The 24-year-old suffered the injury with just over two minutes to go in the first half. In what was a freak incident, Allen came out of the huddle, and then fell to the ground as his knee buckled. The MRI also revealed cartilage damage in his knee.
San Diego will now turn to the likes of Travis Benjamin, Dontrelle Inman, and Tyrell Williams as Phillip Rivers' new key targets.