The Japanese Gyroball Mystery - The New York Times
Greatest Pitches in Baseball Of All Time – Legends Clothing Co.
THE JAPANESE IN NEW-YORK.; Effect of the Grand Ball- More Visits to the Stores--Excursions To-day--The Approaching Departure. - The New York Times
Japan's Kodai Senga Brings Ghost Fork Pitch to Mets - The New York Times
An Analysis of the Gyroball – Society for American Baseball Research
Shuuto - Wikipedia
Yankees' Masahiro Tanaka Epitomizes the Japanese Approach to Baseball - The New York Times
How to Throw a Gyroball: 15 Steps (with Pictures) - wikiHow
E-Ticket: Chasing the Demon Sphere
Shuuto - Wikipedia
The 10 Best Pitchers from Japan in MLB History, News, Scores, Highlights, Stats, and Rumors
E-Ticket: Chasing the Demon Sphere