Well, OBP is more important than SLG when determining runs, and while the Cubs haven't given up a ton of SLG or OPS, that is only because of the low BAA. Way too many of the hits they have allowed have been HR, which is the 2nd killer, along with walks allowed, that has caused this staff to perform so poorly. I think it would be a mistake to think luck has played much of a part in this, and/or it will turn next year. The Cubs are allowing a .258 BAA overall, and it's .265 with RISP. I don't think you can look at the relative rankings you listed, and then say they've given up 30 more runs than they should have. Let me be a bit more clear on my angle, because I feel there is a stronger emphasis on OPS than OBP when correlating Runs scored. When you look at offensive numbers, there is nearly a direct correlation between OPS and Runs Scored. For example, all of the teams in the top 9 for runs scored in the NL are in the top 9 for OPS, and the order only shifts slightly, with teams within 2 in ranking across the board. As expected therefore, the teams with the lowest OPS are also worst in Runs Scored As we would expect, the reverse is true when evaluating the stats from the pitching perspective. The 5 teams in the NL with the lowest OPS against are also the 5 teams that have given up the fewest Runs Scored. There are no anamolies on offense. But there are two teams with anamolies on the pitching side - The Cubs and the Brewers. Each has given up more Runs Scored than the OPS against would suggest. Maybe I am just allowing my optomism for the future to shine through, but it really seems to me that more runs are scoring than the mean would suggest. It sounds like you are overcomplicating things to make the Cubs look better than they are. They give up the most walks, and almost the most HR. But they also strike out the most. That is why they appear to give up "too many" runs per hit. The hits they do give up are big hits, and the walks mean more of those HR are with runners on base.