A win over the Reds drops the magic number for the Cardinals down to 9. The Pirates won in Colorado which keeps the division lead still at four games.
Cardinals magic number to clinch the Central Division — 9
Both the Royals and Twins took Monday off, so no change in the magic number for KC.
Royals magic number to clinch the Central Division — 3
The magic number is determined by taking 163 and subtracting the number of wins for the Cardinals (or Royals) and subtracting the number of losses for the Pirates (and Twins) respectively.