I am pretty sure BA mentioned it would be in St. Louis. Yes a one game playoff would be in St. Louis. Instead of doing a coin flip like they've done in the past, they now go by season record according this article on the MLB website: http://mlb.mlb.com/news/article.jsp?ymd=20110926&content_id=25220606&vkey=news_mlb&c_id=mlb