The term "Moneyball" refers to a systematic shift that has occurred (and is still occurring, to some degree) in the way General Managers in baseball (I'll note that in baseball, personnel decisions such as player signings, trades, et cetera, are handle by the General Manager, and not the Manager, who runs the team on the fields) assess players abilities and operate. "Moneyball" was a title of a book written about one of the first GMs in baseball to use such a system. (The Red Sox organization is another one.)
Basically, it's applying market economics to sports management. In the context of what holdsteady is saying, if FSG determines that Torres' value to LFC is £30M, and Chelsea are offering £50M, they'll take the deal.
I'd actually quibble with that assessment for a few reasons, first off, by all indications, FSG was quite aware when they purchased LFC that the GM position basically doesn't exist in the PL.
Moreover, the systems developed to assess individual performances in baseball, a far more statistically-oriented sport than football, took essentially decades from naissance until it grew into anything resembling a comprehensive system. While I expect that the development of such a system is part of FSG's plan, (and they're not alone. The ownership group which owns the Oakland Athletics baseball team, whose GM is Moneyball's subject, Billy Beane, also owns the MLS' San Jose Earthquakes,) I highly doubt it's developed to the point where they'd feel comfortable shipping out star players without the manager's say-so.
