Complex sentence: By the time Blethen was six years old his mother divorced his father and he soon moved to Arizona with his mom and his dad was no longer in his life, being the only member in the family who didn't grow up in Seattle.
Split into simpler sentences: By the time Blethen was six-years old his mother divorced his father, and he soon moved to Arizona with his mother as his dad was no longer in his life. He was the only member in his family who didn't grow up in Seattle.