Billy Beane's fantasy. Yup. This is not a knock against anyone in particular in this thread, but I hate how people have mischaracterized Billy Beane since Moneyball... The book was about economics and exploiting markets more than anything else. Beane's philosophy as A's GM is about exploiting undervalued parts of the market, not just about finding guys who won't be selling jeans any time soon. At the time, on base percentage was grossly undervalued in the market and allowed Billy Beane not only to acquire these productive players, but also to pay them less than they should be paid for their production. That last part is critical to his philosophy, especially considering the Athletics operate on a limited budget. You have to find ways to work within a market to get a relative bargain. Considering OBP was one of the things Beane and his people thought was undervalued at the time, the book spent a good portion talking about OBP. However, as anyone who has ever taken Econ 101 will tell you, markets will move to correct these deficiencies. OBP has become a much more acceptable metric to gauge a player's productivity. Guys Beane could once acquire for a relative bargain are now valued at a level closer to what they should be paid. For this reason, Beane has to find other ways to exploit deficiencies in the market. I don't know what standards he is using to determine value and future productivity for players these days, but I'm willing to hazard a guess that OBP is not nearly as important in making those determinations as it was when Moneyball was written.