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Diaz hit a solo home run in the seventh inning as a pinch hitter during Saturday's win over Milwaukee.

Diaz burst onto the scene as a freshman, and he outproduced expectations based on his pedigree. Though he's already up to four home runs and is a key cog for the Cardinals, the risk of a sophomore slump still looms, but more of the same from Diaz could put that concern to rest in a hurry.

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