Analysis of Pitching Skills of Major League Baseball Players

摘要

This study examines the pitcher's deciding ball after pushing a batter with two strikes of an aged pitcher group (31 to 43 year-old) and a younger pitcher group (20 to 30 year-old) by using an actual tracking data of the Major League Baseball in 2015. The regression analyses are conducted for all pitchers and for each age group on different pitch types; i.e., two-seam, cutter, splitter, forkball, straight and so on. We also analyze relationships between pitchers' knocking out batters and their pitching characteristics measured by pitch movements by using a framework and empirical analyses. The results of the research model using Structural Equation Modeling show what makes the pitcher advantageous over the batter.