The continued inactivity — he had five days of inactivity, followed by a busy and promising Monday and then two more days of almost total rest — may force Couch to watch Friday night's game at Tennessee from the sideline.
"You don't want to put anybody out there who's not able to do their best," offensive coordinator Tom Rossley said. "It's not fair to him; it's not fair to the guys around him. So, that's our concern — getting him healthy."
Since getting plenty of playing time Aug. 21 against New Orleans, Couch has participated fully in only two practices, dropped out or was severely limited in three practices and had six days off.
Also on the injury front, Packers coach Mike Sherman said Pro Bowl running back Ahman Green is "probably doubtful" for the Tennessee game due to the bruised kneecap suffered last week against Jacksonville.
Definitely out is backup linebacker Torrance Marshall, who aggravated his injured left hamstring Monday.
The rest of a small injured list included defensive end Chukie Nwokorie (hamstring), defensive tackle Larry Smith (quadriceps), cornerback Chris Watson (hamstring) and offensive tackle/guard Atlas Herrion (knee).
One player off that list is rookie defensive tackle Donnell Washington. The third-round pick, as had been expected for a couple weeks, was placed on injured reserve with a partially torn arch.