Mangenius beware — this is what happens to Swapland coaches who are humbled by teams from Foxboro. From the New York Daily News’ Michael Lewis.

In a stunning announcement made two days after his team was eliminated in the opening round of the MLS playoffs, Bruce Arena is out as coach and sporting director.New York Red Bulls managing director Marc de Grandpre said yesterday that Arena had resigned, although sources said the former U.S. national coach had been fired.

Asked what would have saved Arena’s job, de Grandpre replied, “We would have won … (the) MLS Cup. That was the expectation set forth.”

There were other factors involved. According to one source who spoke to the players, there was “anarchy in the locker room.” Arena had a falling-out with Claudio Reyna, his former U.S. national team captain, and underachieving goalkeeper Ronald Waterreus. Assistant coaches John Harkes and Richie Williams also were at odds, the source said.

“Some guys I spoke to said they never saw anything like it before,” the source said.

De Grandpre said he would begin a worldwide search for the 11th coach in the club’s 12-year history. No timetable was established. Former Real Madrid coach Fabio Capello is rumored to be interested.

“I understand that there’ve been numerous coaches throughout this franchise history,” de Grandpre said. “I’ve only been responsible for one. I do understand that stability is important, but with the amount of resources that we’ve committed to this franchise … we expect results quickly. Bruce was in charge of the entire soccer operations from soup to nuts. It was his responsibility.”

One MLS insider said Arena’s departure wasn’t that surprising. “I think he was laboring,” he said. “He wasn’t into it.”