I don't want to read too much into this, but look at the Dax press release:
"We thank Dax for his service to the club," said Red Bulls Head Coach Jesse Marsch. "He will go down as one of the best players and captains in franchise history. At this point in time, we felt that this was the right move to put our team in the best position to succeed both now and for years to come."
This is the first time EVER that Marsch, not Curtis, has been quoted in a press release. Couple that with his mysterious absence...