It's not scientific, but I think it's fairly obvious that guys who have a certain M.O. have poorer results when they deviate from it. It may be accepted that ground balls yield more hits than fly balls, but certain pitchers (like Webb, Zito, etc.) have built their success around inducing them. If these guys aren't inducing them, it probably means they aren't on their game. If they aren't on their game, their results are probably going to suffer, even if it means they give up more fly balls, which should ordinarily mean a lower babip. In Z's case his shifting gb/fb rate may well have had an effect on his babip, because it was an indication he was suffering from a loss of command. It may also mean that his breaking balls weren't breaking as well as in the past, and what may have been ground balls were becoming line drives. Or a combination of both. Z has not been a true ground ball pitcher for some time, but his gb rate dropped about .15 this year, and if some or all of that .15 translated into the higher LD%, it probably would have had an effect on the overall babip. These statistical rules of thumb may apply generally, but clearly they break down in certain scenarios. I think you sometimes have to look at these things in context. As far as location as it applies to inducing ground balls, I think just as often downward movement is the key. If you throw a pitch with good downward break, you're probably going to induce grounders, even if you throw it thigh high. A good low ball hitter will destroy balls down if they don't have movement. But like a slider pitcher working the outer half, a good sinkerballer is that much more effective if he pounds the lower half of the zone.