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Yankees prospect Peter O'Brien warms up in Trenton
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Yankees prospect Peter O'Brien warms up in Trenton on Tuesday, June 10, 2014.(Credit: Patrick E. McCarthy)

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Yankees prospect Peter O'Brien

Photos of Yankees prospect Peter O'Brien during the Trenton Thunder's 7-4 loss to Richmond in Trenton, New Jersey on Tuesday, June 10, 2014.

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