The Tigers' collapse in the American League is one of the biggest in recent history, with a 15-game lead blown in the regular season. Meanwhile, the Mariners are the scariest team in the American League, with a complete roster and a strong chance of winning the World Series. In the National League, the Brewers are a dark horse team with a strong lineup and pitching staff, and the Reds have a talented young core that could take off next season.