September has arrived and there are now just four weeks remaining in the 2018 MLB regular season.
There are 15 teams still clinging to some form of contention—seven in the American League and eight in the National League.
The AL West, NL East, NL Central and NL West are all still up for grabs with division leads of five games or less, and the NL West, in particular, is shaping up to be an all-out war with three teams separated by just one game.
For now, just remember these rankings are fluid. Teams rise and fall based on where they were ranked the previous week.