Complex sentence: Phillips left the band in 2005, citing creative differences, but returned in 2009, and left again in November 2011, he is currently working on a new project called The Fallout Collective.
Split into simpler sentences: Phillips left the band in 2005, citing creative differences, but returned in 2009, and left again in November 2011. He is currently working on a new project called The Fallout Collective.