Wrong thread really, but who do you see as Levy's Moneyball purchases then? As far back as Berbatov?
Levy has always been described as a "shrewd businessman", by some seemingly not particularly positively so. That to me is the essence of moneyball and his transfer strategy after the initial "5 year plan" failure under Hoddle has generally been one of shrewd business. I think Arnesen had a good influence on him, from what I remember reading at the time Arnesen really convinced Levy on how squad building should be done.
Berbatov is one for sure, I would also include Modric in a similar class, but also players like Pienaar (even if it didn't work out) and Kranjcar. Exploiting contract situations and players that want away is very much moneyball territory in football. Sandro, Kaboul, Ekotto, Walker etc also fall into this category.
The only players we have signed that have been clearly outside that category was when a player was needed to instantly fill a gap in the starting 11 that had to be able to do a job straight away was brought in. Palacios, Defoe and then Keane when Harry first signed. Hutton, Bentley and a few more under Ramos I think.
The key is that theoretically every player in the world is good enough to warrant a transfer value (to a club), although that number is very difficult to estimate accurately. Through good scouting and good work you can identify when a player that is good enough, and will fit in your team is available for less than that value for whatever reason. If you consistently bring in those players and only in "an emergency" or in special circumstances bring in players that cost more than their actual value then you are doing good moneyball work, in my opinion at least.
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Back to Liverpool: One of the reasons I wasn't convinced about the FSG "moneyball approach" to Liverpool and football was that this concept (to my understanding) completely changed Baseball, there were (ultimately) obvious truths about player abilities that were ignored or unknown while old fashioned irrelevancies were often decisive in transfers. Thus a club was able to gain a big advantage on other clubs through this moneyball based on stats approach. First of all stats would be much harder to use in football so identifying differences between actual value and rated value would be harder and football clubs have in general already fundamentally understood the moneyball concept and valuation of players quite well even though I don't think it had a fancy name. FSG were (like in the baseball story) not the first to do this, not by a long shot. They hoped to be Apple bringing out the iPad on the footballing world, but didn't realize that it was already there and they were just another random electronics company bringing out another iPad clone in a very competitive market.