I don't think you have anythign to worry about with Hudson. I have him high on my draft list somewhere between 5-8 best pitcher.
Mulder, I'm not as high on but i might chance him if i can get him cheap enough.
Zito- I don't want him on my fantasy team. HE will have added pressure of being the ace and he has been declining the past few years.
I think Hudson is a great pick though