I'd wait to see how the offseason develops before predicting mediocrity for Zito. He really figured it out last year after adding the slider and such and getting confidence in his pitches and himself. He had a very nice second half and if the A's get a slugger in the offseason, I think he'll do very well. I'm not necessarily predicting a return to 2002, but I think he'll be a good number 2 pitcher on all but the shallowest fantasy staffs next year.
He's a good roto guy because at the end of the year he'll have his typically 3-4ish starter-typeline, but I wouldn't want him in H2H unless I really liked the matchup because he has a tendency to blow up sometimes, especially early on and against the better hitting teams (mainly TEX).