Based on this tweet and this tweet (and others), we have learned the following:
* Jermaine Jones will undergo tests tomorrow to see if he can play Tuesday or not. He likely picked up a concussion on Friday.
* Herculez Gomez is unlikely to play on Tuesday due to a knee injury that he picked up at the end of the Liga MX season.
* Danny Williams has been released to go on vacation after an agreement was made between US Soccer and Hoffenheim. I don’t think Williams had returned to full training since coming into the camp with an injury.
* Panama will also be without a top player as Blas Pérez will not travel to Seattle due to gastrointestinal problems. Perez has scored 10 goals for Panama so far through qualification (since the second round), tied for the second most in CONCACAF.