Maybe ask Bill S http://forum.brewerfan.net/images/smilies/wink.gif, since he has reported the percent of runs scored via HR from time to time. Last year, I was annoyed by his constant harping on the evil of "relying too much on the HR" and the bliss of "manufacturing runs". What I did when comparing was just add up the runs from HR based team splits for HR in each situation...bases empty, one on, two on, bases loaded. I'm not sure about using percentages, as what if team A has scored a total of 300 runs and 150 were via HR, while team B has scored 200 runs and 50 were via the HR. Both teams scored 150 runs without the benefit of a HR, but team A scored 50% via the HR and team B only 25%. I think (hope) even Bill S, would expect team A to have the better record. I think you would somehow need to normalize things based on total runs scored, if the question is does a team win less often when they rely on the HR (even though they score just as many runs as another team that does not rely on the HR). Or is the question really: Do teams that rely "too much" on the HR tend to score fewer total runs?