no, but the training spped of a skill are affected by similiar Skills, and if you train JS the similiar skills must be pretty low in comparision + age.
I don't think that the reached the all star limit, which will affected training for every position, because he is much weaker then fast training player i know ... Maybe such a high skill like his Jump shot affect the potential more then more balanced skill set, but i like to say that this post means something different:
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