Jets cornerback Antonio Cromartie suffered an injury to his ribs in the second half of the team's lost to the Raiders on Sunday.
The Jets called it a rib injury, but a league source confirmed reports that Cromartie suffered a bruised lung.
He was in severe pain after the game and didn't talk to reporters.
"We're not sure about it right now," Jets coach Rex Ryan said of Cromartie's injury.
Cromartie May Have Bruised Lung