Unless they used a US charter line I hope no US airline would bring them back.
http://news.passportoffices.us/help/passport-denial-and-revocation/
Reasons A Passport May Be Revoked
The Department of State, in accordance with the Title 22 of the Code of Federal Regulations 51.60-62, and 51.65, will revoke passports for the following reasons:
1. Passport was obtained illegally or fraudulently
2. Non-Payment of child support
3. Passport was misused or changed/altered
4. Passport holder’s Certificate of Naturalization or Certificate of Citizenship is cancelled
5. Certain drug trafficking convictions
6. Those convicted of sex tourism
Some of the players might fail on #2, #5, or #6.
sports talk radio must read this site....they raised the issue of passports revoked (but not the possible reasons....maybe just a coincidence).