Umpires expand or contract the always changing strike zone. Examining PITCHf/x data, Ian York visualizes how big the zone gets 3-0 and how small it is 0-2.
Ian York demonstrates umpire strike zones can be tracked, contrasted and compared across baseball through scientific data analysis of PITCHf/x data.
Teams are always looking for competitive advantages. The Red Sox catcher framing with Christian Vazquez, Ryan Hanigan, & Sandy Leon may be a big one.
Why does the curveball curve? Understanding the interaction of the ball with the air can help you see when a pitcher is on his game or having a bad day.