from the BA article quote: The high-speed video goes beyond that. Telling a pitcher what a pitch’s effective spin rate is doesn’t mean nearly as much as letting him see the seams of the ball rotate on video and watching how the ball leaves his hand. “If I’m Adam Ottavino, I trust the analytics department,” Boddy said, “but (Ottavino) doesn’t know what spin rate feels like. What Adam needs to know is, ‘When I throw it like this, you tell me it’s good, (but) what does it look like coming out of my hand?’ It bridges the gap between the data and feeling.”end quote