Romo suffered the same injury himself back in 2010, resulting in him missing the final 10 matches of the regular season.
He told reporters: "It's very difficult. Obviously, the discomfort - if you're feeling it at all - you can't come back and play, but even than that, even when you get relatively where you feel like it's pain free, it still doesn't mean you're ready to play just because it's such an easy thing to hurt again.
"There's just so many cases of people come down with another collarbone injury, the same one just re-injuring it. That really plays a big role in determining when you come back.
"It's an injury that you almost have to wait longer than when you're initially diagnosed, typically because it's just the re-injury factor alone plays such a high role. I remember I was doing everything I could to get back out there. I know Aaron's doing the same thing. If he's been feeling good for a couple of weeks then I think that's something where you could really have a chance to say his re-injury factor has gone down and if that's the case you might be able to go."
The Packers finally won their first game without Rodgers when they pipped the Atlanta Falcons last Sunday.