Sports are big business, and for the USA, they don’t get much bigger than Major League Baseball. Ok, yes, there’s the NHL, that’s a bit bigger. But there’s not much else. The thing is, though, such popularity means there’s a lot of money involved. And with the sort of money involved with MLB, teams have to be very careful who they recruit.
Historically, they use talent scouts that go and watch people play and use their experience to try and figure out who might be pretty good. It’s not an exact science and they don’t always get it right, but that’s the way it’s been. Now, thanks to technological advancements, it seems they’ve started to shift to using a couple of iPhones along with some artificial intelligence for a more analytical approach.