Cornerback Tre'Davious White and guard Quinton Spain were among the Buffalo Bills not practicing Sunday.
White suffered a quadriceps injury in Friday's game against the Detroit Lions, though he said he was fine after the game. Spain injured an ankle and coach Sean McDermott said it was too early to offer a prognosis. "We don't really know," he said.
Center Mitch Morse remains in the concussion protocol, but is expected on the practice field. Defensive back Cam Lewis also is in the protocol.
Tight end Tyler Kroft remains out with a foot injury. Tight end Kyle Carter is out with a knee injury. Running back Senorise Perry (quad), defensive tackle Mike Love (pectoral) and offensive tackle De'Ondre Wesley (knee) also are out.
The Bills conclude the preseason Thursday at home against the Minnesota Vikings.