will start training camp without four players.
Left Terron Armstead (shoulder), center Max Unger (foot), linebacker Dannell Ellerbe (undisclosed) and offensive lineman Senio Kelemete are on the physically unable to perform (PUP) list, according to Monday's NFL Transactions report.
Armstead underwent surgery to repair a torn laburm suffered during the mandatory three-day minicamp in June, while Unger underwent foot surgery in early May.
Ellerbe missed time during minicamp, and Kelemete wasn't observed on the practice field during organized team activies (OTAs) and minicamp.
While players placed on the PUP list before training camp are allowed to return once cleared, Armstead is expected to miss 4-6 months.