The USA international fullback will move to Juve this month before being loaned to Benevento.
TMW says Reynolds will stay with Benevento for six months if they're relegated at the end of this season, or 18 months should they stay up.
Serie B Foggia had also expressed interest in the youngster.
But it is Benevento where Reynolds is expected to kickoff his Italian career - in partnership with Juve.
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