German left-back Kai Wagner, 28, has been with the Philadelphia Union for seven seasons and was previously of interest to Inter Miami. He now appears to be nearing a move to Birmingham City. Sky Germany’s Florian Plettenberg reported that a transfer valued at €2.3 million ($2.7 million) is nearing completion and that the player is already in England to finalize the deal. Wagner's contract with the Philadelphia Union is set to expire at the end of 2026. According to Transfermarkt, his market value was estimated at €5.00 million throughout 2025.