zito has always been one of my favorite pitchers, but he hasnt been himself since 2002 when he was cy young caliber.
as far as webb goes, hes solid. but no pitcher that has ever had a 7-16 season should be in a top 5 discussion. i know every pitcher has a down year. but 7-16 is just an implosion, and a sign that your stuff is hittable.
zambrano i simply left of the list by accident. im not sure hes better than beckett. but hes every bit as good and definitely needs to be in the discussion. he walks too many guys for my liking, and that makes him a tough pitcher to back when he is upwards of -200 sometimes but when he is on he is awesome