Football

That's one of the key points of moneyball though, buy players with a bad attitude, and improve it, and you should have a much better player.

Not in the edition of the book that I read. One of the key points was buying statistically proven players that fit into your strategy (lots of 'walking' if I recall correctly, though I'm a bit hazy on what that means...) and buying them on the cheap.

This particular transfer appears to have resulted in them buying a player that doesn't fit in their strategy, wasn't proven at all beyond a good spell over a few months, and was bought at an incredible premium...