Oakland running back Darren McFadden left the field shortly before halftime Sunday because of an ankle injury, the latest setback for the Raiders' top rusher.
X-rays on McFadden were negative during a 42-32 loss to Tampa Bay. Oakland coach Dennis Allen didn't say which ankle was hurt and didn't provide additional information.
Earlier in the game, Raiders defensive tackle Desmond Bryant was taken to a hospital because of a fast heartbeat. No further details were announced about Bryant, in his fourth season out of Harvard.
Green Bay linebacker Clay Matthews, Pittsburgh receiver Antonio Brown and Washington wide receiver Santana Moss were among other players who exited early.
Matthews hurt his hamstring injury after a failed sack and Packers receiver Jordy Nelson injured his ankle.
"We need to get healthy, that's what bye weeks are for," Green Bay coach Mike McCarthy said after a 31-17 win over Arizona.
Brown, the Steelers' top receiver, left in the first half of a 24-20 victory over the New York Giants with a banged-up left ankle. Moss sustained a concussion in the fourth quarter of the Redskins' 21-13 loss to Carolina.