Boston Red Sox

Sox prospect Michael Kopech believes controversies are behind him

Michael Kopech has been touching 100 mph with his fastball in the Arizona Fall League. Stan Grossfeld / The Boston Globe

Top of the first, against the Mesa Solar Sox, Michael Kopech rears back to pitch, and his blond curls momentarily conceal the ball. Four-10ths of a second later, it smacks into the catcher’s glove, and the pitcher’s momentum sends him sliding off the mound toward first base.

Strike one.

The radar gun behind home plate flashes 100 miles per hour. The 20-year-old Red Sox prospect, the fastest gun in the wild West, is at work. Only he’s not wild at all. The next eight pitches are all strikes.

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