Not to digress but its not a myth, will carrol said its in his arsenal but its not. Its a pitch that he has admittedly thrown before but he can't throw it with any consistency. here's an article on it http://sports.yahoo.com/mlb/news?slug=jp-gyro031306&prov=yhoo&type=lgns and the gist of the article Oh, yes," Matsuzaka said. "I'm trying to throw it." Turns out Daisuke Matsuzaka, the pitcher who would come to the United States and cause a revolution with his gyroball, doesn't throw one. He throws a fastball, a sinker, a changeup, a splitter and a filthy slider. He'd like to teach himself how to throw a gyroball, and Matsuzaka said he may trot it out Tuesday when he starts for Japan against Mexico in the World Baseball Classic. "I have done it in a game," Matsuzaka said. "But not too much. Sometimes accidentally."