Late breaking junk ok? You tell him to be aggressive on fastballs down the middle and take all the sliders outside. It's alot easier said than done.
Here, buy MVP 2005. Turn the sliders all the way up with variable strike zone, turn off the hitter's eye. Turn the pitch speeds way up and turn down your own contact. Then have someone throw you 94 mph cutters or fastballs mixed with nasty sliders with maybe Brad Lidge.
We can't expect Joe Crede to have a perfect AB every single time. We can hope or pray he hits above .260 but there's no secret you can tell him that will make him any better.