I like Arroyo of those 3. K's are up, BB's are down, good run support, and except for a bad outting vs the Yanks he's been very consistent of late.
Hampton has been winning and looking pretty good doing it and also looks primed for a good second half. Lackey has not been as consistent, but certainly has the talent to be productive and has a pretty easy August schedule.
I'd put Weaver in with this bunch but not appreciably ahead.