The son of former big-league slugger of the same name. John Jr. is yet another talented ballplayer that was expected to be a first-round pick in the 2002 draft out of high school, like Pelfrey, Clement & McCormick. Mayberry unlike those players was selected in the first-round of the draft, but the Mariners were unable to sign Mayberry out of his commitment to national baseball and academic powerhouse Stanford. Mayberry has a huge, athletic frame with great power potential. While he played a little bit of 3B in high school, and can play both corner outfield positions, his best position is first base, where his glove and size draws comparisons to Derrek Lee. Given his size, his swing can get long, and is likely going to have his fair share of strikeouts, but he does do a good job pulling his hands in and keeping them in front of the barrel of the bat on inside pitches. Anything over the middle to outer half of the plate he crushes.
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