Circle changeup the index finger on the seam of the ball and the thumb on the side of the ball to "choke" the ball. According to his autobiography, Nolan Ryan also developed his own circle changeup to add another off-speed pitch without having to throw a slider (as sliders are believed to more frequently cause injuries). Circle changeup In baseball, a circle changeup is a pitch thrown with a grip that includes a circle formation, hence the name circle changeup. The circle is formed by making a circle with the index finger, holding the thumb at the bottom of the ball parallel
Kilometres per hour Kilometres per hour The kilometre per hour (American English: kilometer per hour) is a unit of speed, expressing the number of kilometres travelled in one hour. Internationally, km/h is the most commonly used unit of speed on traffic signs and speedometers. Although the metre was formally defined in 1799, the term "kilometres per hour" did not come into immediate use – the myriametre () and myriametre per hour were preferred to kilometres and kilometres per hour. In 1802 the term ""myriamètres par heure"" appeared in French literature and many French maps printed in the first half of the nineteenth century