Jeff Passan Tackles The Gyroball
Very cool article up from Jeff Passan, who has led the way as far as getting correct gyroball information to the United States. Passan spoke to the pitch's creator in depth, and even managed to throw one himself.
Passan observed that the pitch "looked like a fastball and moved like a fastball." Apparently, though, it's slightly different. Pedro Martinez may have been throwing it without knowing it.