Biology, coaching and even ambition and curiosity affect how humans throw a baseball. Equal parts art and science meld. "Each pitch is so unique to each guy's body action," Franklin coach Zach ...

Remarkably, considering that the ball weighs 1.25kg (roughly 2.75 pounds) and is about the same size as a basketball, the best players in the world can throw it as fast as 60 kph (about 37.3 mph).