FIFA have rejected an appeal from Chelsea to overturn their 1-year transfer ban for breaking youth transfer rules.
The Blues will not be able to register players over the age of 16 for the next two transfer windows now. However, the club is expected to approach the Court of Arbitration for Sports (CAS) now.
They will look to get the verdict frozen or overturned at the CAS.
This doesn't affect Pulisic playing for Chelsea next season. He signed in January and was loaned back to Dortmund. The FIFA punishment is a ban on registering new players.