Baseball, surnames starting with A: showing 433–480.

• RARoberto AlomarNew York Mets, 2B
• Roberto AlvarezTampa Bay Rays, C
• Roderick AriasNew York Yankees, SS
• Rogelio ArmenterosHouston Astros, SP32years old
• RARoman AngeloArizona Diamondbacks, P
• Roman AnthonyBoston Red Sox, LF22years old
• RARonis AybarNew York Mets, OF
• Ross AdolphHouston Astros, LF
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