Cover legend: Clayton Kershaw, pitcher for the Los Angeles Dodgers and reigning National League Cy Young award winner, shown just before releasing the ball. The superimposed data show the release points for all four-seam fastballs during the May 8, 2011 game. The color of the data denote pitch order (blue, green, orange, and red denoting the first through fourth quartiles of the pitches), and illustrate a slow drift in release point that is typical of Major League pitchers. For more details, see the article by Chaisanguanthum et al. (pages 12071–12080). Photograph by Jeff Gross/Getty Images Sport. Used with permission.