Many people have commented (in critic reviews and IMDB comment postings) that Billy Martin, born in California and having lived most of his life in New York, never spoke with a Southern accent as seen on the show. According to Jonathan Mahler's book, upon which the series is based, while Billy was a manager for the Texas Rangers, he loved Texas and it's people so much that he adopted the accent and the habit of wearing cowboy boots and hats for the rest of his life.