Actually, us Liverpool fans are pretty familiar with Moneyball ever since FSG took over the club 10 years ago, they tried a carbon copy of that approach and were ridiculed after it failed spectacularly, with the likes of Steward Downing going something like a whole season without a single goal or assist (from memory). Basically, only Jordan Henderson survived from those Moneyball signings, it was almost hilarious when they tried to use those numbers to supply Andy Carroll from all sides of the pitch, with Downing crosses and Charlie Adam from set pieces etc.
Never studied this in depth but the sabermetrics model was since improved when Klopp took over, and that new improved recruitment policy is what other clubs are most interested in when they keep repeating how they want to follow the Liverpool model. Chelsea in particular is trying out something very similar over the last couple of transfer windows.
It's also been reported just days ago that Billy Beane is looking to invest in Liverpool and work closer with the club on improving that further, and I'll be absolutely buzzing if he does come.
But yeah, it's definitely interesting how a revolutionary concept from baseball made its way into football.