Athletics prospects Leo De Vries and Jamie Arnold out indefinitely after injuries
What happened
Two of the Athletics ' top prospects, infielder Leo De Vries and pitcher Jamie Arnold, are out indefinitely with injuries. De Vries, baseball's No. 2 prospect according to MLB.com, will undergo surgery on his right shoulder on Monday in Arlington, Texas. The 19-year-old, who was acquired last season when the A's traded closer Mason Miller to San Diego, was hitting .290 with 13 home runs, 55 RBIs and 34 stolen bases…
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