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As an overview of Spin Axis, this video will explain how to calculate the metric by yourself and discuss the importance of spin axis as it relates to the trajectory of a given pitch. Slide 1: Spin on Fastballs Thrown by Elite Baseball Pitchers (Nagami et al, 2011) Image Published by Rapsodo Baseball Twitter Feed (https://twitter.com/rapsodo/status/1022525209927135232) Slide 2: Describing baseball pitch movement with right-hand rules (Bahill and Baldwin, 2007) How baseball spin influences the performance of a pitcher (Nagami, Higuchi, and Kanosue, 2013) Pitches and Stuff: Arm Angles (Richmond, 2015- SOSH) Slide 3: Factors determining the spin axis of a pitched fastball in baseball (Jinji, Sakurai, and Hirano, 2011) Video courtesy of Eric Jagers Twitter Feed Slide 4: Image Published by Rapsodo Baseball Twitter Feed (https://twitter.com/rapsodo/status/1022525209927135232) Images Published at Brooks Baseball (http://www.brooksbaseball.net/landing.php?player=545333) Slide 5: Video courtesy of Eric Jagers Twitter Feed Image Published by Rapsodo Baseball Twitter Feed (https://twitter.com/rapsodo/status/1022525209927135232) Slide 6: Image Published by Rapsodo Baseball Twitter Feed (https://twitter.com/rapsodo/status/1027301968321163265) Determining the 3D Spin Axis from TrackMan Data (Nathan, 2007- Updated 2015) Slide 7: Video courtesy of Eric Jagers Twitter Feed
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