The crucial thing with Mussina is that his K/9 the last two years is right around his career average, another is the guy still knows how to pitch. This combined with pitching behind a great offensive team means he should still be drafted in all standard Roto and H2H leagues at least.
He will get lit up from time to time but he rarely does at home and you will still get decent 4th starter production out of him if you sit him against the Red Sox and away against teams like Texas.
And if he does give you what he did at the end of 2004 which is not at all unlikely, you've got one helluva bargain.
When you're right no one remembers, when you're wrong no one forgets - NZF