Getty/Chelsea FCJamie SpencerChelsea announce Caleb Wiley signing as highly-rated USMNT defender joins in £8.5m deal from AtlantaC. WileyChelseaAtlanta UnitedUSAPremier LeagueMajor League SoccerTransfersLeagues CupChelsea have announced the signing of USMNT left-back Caleb Wiley from MLS side Atlanta United.Article continues belowArticle continues belowArticle continues belowArticle continues belowWiley joins from Atlanta UnitedTransfer worth £8.5mDefender signs six-year deal