Oakland A's 2019 Community Prospect List #28: Alfonso Rivas brings an unusual skill set - Athletics Nation
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2018 MLB Draft: Arizona's Alfonso Rivas selected in 4th round by
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Alfonso Rivas, torn between two countries, finds best of both
Oakland Athletics 2019 Top 50 Prospects
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Oakland A's 2019 Community Prospect List: The final Top 30 list
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