This is the third time in history that Sounders fans have voted on their GM’s job. For the third time in Seattle Sounders history, fans have an opportunity to cast a binding judgment on the general manager’s performance. Like the two previous times this happened, I suspect that the general manager will receive overwhelming support. In eight years since taking over for Adrian Hanauer as Sounders GM and President of Soccer, Garth Lagerwey has amassed an impressive resume that includes two MLS Cups, four trips to the MLS Cup final, a Leagues Cup final and, most recently, the Concacaf Champions…