Jenkins was hurt in the fourth quarter of Sunday's game at Tampa Bay while attempting to sack Buccaneers quarterback Brian Griese. Jenkins is believed to have a torn pectoral muscle, saying Monday that he couldn't lift his right arm above shoulder level.
Jenkins started the season as a leader of Green Bay's defensive line. In four games, he had 2½ sacks, 10 quarterback pressures, a forced fumble and 18 tackles.
Pettway was sitting in a vehicle with former Jaguars teammate Richard Collier early Sept. 2 when a gunman fired into the vehicle, according to the Jacksonville Sheriff's Office. Pettway was not injured in the attack, in which Collier sustained injuries that left him paralyzed and forced the amputation of his left leg.