Explaining Kelvin Herrera’s Home Run Problem
Kelvin Herrera has one of the best fastballs in the big leagues, one that gets up to 100 MPH on a regular basis. He should be really really good, and in 2012, he was, keeping the ball on the ground, in the park, and not walking many batters (and most importantly, not giving up many runs). However, this year, Herrera's groundball rate has evaporated, and he has given up more homers than walks (an insane 9.88 ...
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