this is always my fear as well, and i stop myself from vocalizing it because it feels patently ridiculous. But like you said...what else explains this? Sure there's the idea that we don't cut bait on guys who have been very productive in the recent past, which of course few of us advocate for just dumping the under-performers. However, how we can just keep trotting out the same guys and getting the same results over and over, I can't be certain, but I think there's a colloquialism about what that's called.