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With Caleb Porter out in Portland, here's how long each MLS coach has been in his job

Caleb Porter’s stunning exit in Portland this week marked the seventh MLS head coach to leave his position this calendar year, either by choice or force. He was the third longest-serving boss in the 22-team (soon to be 23-team) league behind Peter Vermes and Ben Olsen. Only five current coaches have guided the same club without interruption for four full seasons.

Here’s the current cast of coaches and the two vacancies . . .

1. Peter Vermes, Sporting Kansas City (hired in November 2009 after interim role for three months). Status: one MLS Cup title, three U.