Alex Cora admits he's concerned about Red Sox top prospect Marcelo Mayer for this reason
Briefly

"I mean, obviously not ideal; he had a good season, did a good job. But honestly, I didn’t know. ... Getting him right is the most important thing."
"There’s a lot of potential there. ... The injuries, obviously, from my end, (are) concerning, to be honest with you. Just have to make sure he is right."
Read at Boston.com
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