As someone who thought the Packers should have signed Green but was satisfied when they ultimately signed Cook, I'm comfortable saying that as the information on the 2 players stands today, "Good Choice Packers!". This wasn't Green getting hurt between the time the Steelers signed him and now, it was the Steelers signing a guy that had some medical conditions at the time. The ankle was a known condition and the headaches were an existing condition as well. How much anyone knew about the headaches, is anybody's guess. San Diego letting him walk, isn't a tell all, but you have to wonder how much they knew that other teams like the Steelers didn't.
Cook is healthy, looked good in preseason and is playing, Green isn't and there is talk about him hanging it up. I'll take that in grading the decision (assuming there was one) made by the Packers as a good one. What kind of impact either will have on the team from here on out remains to be seen.
"Green, who has not practiced yet in training camp because of recurring headaches, is considering retirement, Mike Florio of NBC Sports reports."
Another writers opinion on why Green is out:
http://www.nfl.com/news/story/0ap30...green-sidelined-by-headaches-not-ankle-injury