One of the longest, most successful and also frustrating coaching tenures in recent Southeastern Conference history is over. After 15 seasons, 145 wins and two SEC championships, Mark Richt and Georgia parted ways on Sunday.The official release said the two sides “mutually agreed” that Richt would step down following a meeting with athletics director Greg McGarity on Sunday. But make no mistake, Richt had spent the last month fighting to keep his job and coach in 2016. He flew to the West Coast to post social media pictures with Jacob Eason, the top-ranked quarterback recruit who is committed to Georgia. He won close games against Auburn, Georgia Southern and Georgia Tech to finish 9-3 this season, following a 10-3 record last year.It simply wasn’t enough, as Richt’s record in the last three seasons lacked any heft or, more important, SEC East division titles.