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If Walker can make supp-1st round while pitching "in between basketball practices," then in theory he's got all kinds of room for growth ...
Tuiasosopo is a bit of a comparison here ... focused more on football, and despite his weirdly bad start in the minors had a lot of his learning curve out in front of him...
Who knows. Maybe Walker will immerse himself in baseball and take off. No doubt that is the M's logic with him.