Complex sentence: On September 11,2013, Ross officially announced his "retirement" from WWE as his contract had expired and was not to be renewed, however it was suspected that he was fired due to his actions at the roster announcement.
Split into simpler sentences: On September 11,2013, Ross officially announced his "retirement" from WWE as his contract had expired and was not to be renewed. It was suspected that he was fired due to his actions roster announcement.