School of Hard Knucks: My Three Sons and Baseball's Wildest Pitch

A helicopter dad nearly spins out of control as his sons struggle to master the knuckleball-and perhaps save baseball's most storied pitch from extinction.

The knuckleball is the only skill that can elevate an athlete without a superjock's speed, strength, or explosive power to the Hall of Fame. Thrown without spin, it darts around unpredictably for reasons physicists and engineers labor to explain. It's a secret weapon every pitcher should want to master, so why is the knuckleball close to ...