I disagree on Parra and Looper is fine as a #4 on a playoff team. As for BABIP, it doesn't really matter if you believe in it because it has proven to be a valuable stat for predicting the future regardless of what you think. Sounds like you guys are getting hung up on the initial theory and not where the research has led the stat in the past 8 years. When a guy is sitting at something like a .240 BABIP you know that he won't keep it up because they never do. When they are sitting at a .275 or .280 then yeah they might keep it up. BABIP varies on pitch count, pitch type, GB vs FB etc so there is no magic number that every pitcher should hit. It is still too early in the season for peripherals to really tell the whole story anyway though so the BABIP part is going to really make or break the discussion. We have 3 SP that could realistically have a sub 4 ERA this year, Gallardo, Parra and Bush. We have 2 more that could plausibly be under 4.50 ERA (though I think Suppan's odds are pretty low personally). If you want to look at the negative side we have 4 pitchers who could have an ERA over 4.50 on the season as well. There is no definitive track record for these guys. Bush has seen his ERA all over the place, Parra hasn't pitched a full season yet and this is only Looper's 3rd year as a starter.