SO, I watched Mussina pitch this weekend. Two observations.
1. He's having major velocity trouble. So even in the innings when he looked good, he had very low Ks.
2. Because of the above, he gets in trouble fast. Because he can't fool people with speed, he has to do it with location and movement, which means he ends up walking a lot of people since he can't get into the strike zone too much, or he'd get hammered.
This leads me to two conclusions.
First, he's very high risk. He'll get wins, because he's an experienced guy, but even so half the time (or less), it will be a good outing. The other half, he's just going to get the win because of the Yankees offense. You'll get no Ks, usually a high ERA+WHIP, just to get one win.
Second, the Yankees are in trouble. They are relying on some old arms to get them through, and basically it's down to a rookie, Clemens, and Pettite for the playoffs. I don't think that will get them that far. And the way they play defense, like the coaching staff is not preparing them at all, this could be trouble for Torre.