Johnson sustained a left knee sprain in the first half and did not return. He is scheduled to undergo an MRI on Tuesday.
Defensive end Jason Taylor injured his left shoulder but said the injury wasn't serious and he would have returned to action had this been a regular season game.
Safety Shawn Wooden sustained a left ankle sprain.
Quarterback Ray Lucas was removed from the game when his back stiffened up on him as he sat on the bench between series. The injury was classified as lower back spasms.
Guard Heath Irwin sustained a right shoulder contusion.
Finally, linebacker Tyrus McCloud sprained his right ankle.
All the injured players will be re-evaluated on Tuesday.