Baseball Statistics and Analysis | FanGraphs Baseball
"Combining the previous two questions, as a pitcher’s ground-ball rate increases does a pitcher’s home runs allowed per non-ground ball increase? No. Less surprising now given the answer to the two previous looks, but worth mentioning for completeness. Also worth noting is that on all of these the R^2 values are incredibly low and the slopes are not dramatic. The best rule of thumb I can state from this look is that a pitcher’s ground ball rate has no impact on his various rates of yielding home runs and what impact there is might actually be negative."