Apparently, it saves MLB some money.I'd love to know how much, because that really strikes me as something that would not be worth it.
It's supposedly about a 40% higher cost for the MLB balls. Something like $180 for a box of balls as opposed to $120, or thereabouts. MLB seams are tighter and lower, so the ball is slicker and spins faster.
But yeah, that's just penny-wise pound-foolish behavior. Especially at the top levels. You'd think AAA and even AA would use the same ball.