"Almost all of fluid dynamics follows from a differential equation called the Navier-Stokes equation. But this general equation has not, in practice, led to solutions of real problems of any complexity. In this sense, the curve of a baseball is not understood; the Navier-Stokes equation applied to a base ball has not been solved."

“We not that those players with weaker arms might be better off throwing at a lower angle to get the ball to the plate on the bounce. If the surface is Astroturf, the 90-mph player can gain as much as 0.2 seconds, or 6 feet, on the runner by throwing on the bounce. But if his team is playing on grass and his groundskeeper has kept the grass long and well watered to help his team , the ball may lose so much speed at the bounce that nothing will be gained.”

“Balls curve as a consequence of asymmetries in the resistance of the air through which they pass.”

“Every 3 feet of lead is worth about one-tenth of a second, and a rolling start is worth a good half second. Indeed, the difference between the runner having his weight mainly on his front foot and mainly on his back foot must be worth more than one-tenth of a second.”

“To hit a baseball with dispatch, one needs both to step into the ball and to rotate.”

“Control pitchers hit corners with an uncertainty of of about 3". One must be a fairly good shot to shoot a pistol with that accuracy.”

“A small, but interesting, portion of baseball can be understood on the basis of physical principles. The flight of balls, the liveliness of balls, the structure of bats, and the character of the collisions of balls and bats are a natural province of physics and physicists.”