When examining the 2018 draft’s collection of top high-school shortstops, one is confronted with three vastly different physical entities in Santiago HS (CA) SS Brice Turang, Montverde Academy (FL) SS Nader De Sedas, and North Broward Prep (FL) infielder Xavier Edwards.
Edwards is explosive. A plus-plus runner with good hands and enough arm for the left side of the infield, he also possesses gap-to-gap power. He’s performed, in games, against elite pitching and might be my first pick among all 2018 high schoolers if we were picking teams for a game of sandlot ball tomorrow. He’s also a slight 5-foot-9 and 155 pounds.
De Sedas is a switch-hitting hammer who was being covered in his native Panama when he was just 13 years old. He moved to Florida late in adolescence and has shown big raw power from both sides of the plate, as well as feel to hit in games despite having adopted switch-hitting somewhat recently. But while De Sedas has premium arm strength and is smooth for his size, he’s also rather big. At a listed 6-foot-2, 192 pounds, De Sedas is already larger than Manny Machado (6-foot-3, 185) and Evan Longoria (6-foot-2, 170) were when coming out of high school.
Finally, there’s Turang. Lean, rangy, and acrobatic, he also features a plus arm. He’s instinctive, procedurally advanced, and a potential plus defender at short, but he may have limited, one-dimensional offensive impact.
As with any prospect, I’ve attempted to project the future defensive value of the three players mentioned here. Because of their vastly different builds, however, I became curious about the physical makeup of major-league baseball’s current shortstops and how the upcoming draft class — especially De Sedas, who belongs near the top of the class if he can stay at short — fits among them.
To address my curiosity, I began compiling not only the current heights and weights of the league’s shortstops but also their heights and weights at age 17 — or, roughly the age at which each of them was either drafted or signed out of Latin America. I then expanded my criteria to include all players who had recorded at least 450 innings at shortstop during the last three seasons. I also calculated both current BMI and also BMI at age 17 — as well as changes in height, weight, and BMI during that span.
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