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Hayes (wrist/hand) continues to swing in the batting cage and could begin swinging on the field by the end of the week, Alex Stumpf of DKPittsburghSports.com reports.

The 24-year-old isn't experiencing any soreness as he continues to swing, so he should keep advancing through the hitting program. Hayes is expected to get some at-bats on a rehab assignment before returning from the injured list, though the team has yet to finalized any plans.

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