Complex sentence: Mattingly goes by the nickname of TMatt, often calls himself a prodigal Texan, and is a practicing Eastern Orthodox Christian, a member of the Antiochian Orthodox Archdiocese of North America.
Split into simpler sentences: Mattingly goes by the nickname of TMatt and often refers to himself a prodigal Texan. He is a practicing Orthodox Christian, a member of the Antiochian Orthodox Archdiocese of North America.