The Cardinals salvaged one game of their series in Chicago by holding off the Cubs in a 4-3 victory on Sunday. The Pirates beat the Dodgers by the same score to stay within four of St. Louis
The Minnesota Twins snapped their five-game losing streak by beating the Angels 8-1 on Sunday, but the Royals knocked the magic number to three with their 10-3 win over Detroit. With off days on Monday for Minnesota and the Royals, the earliest to clinch could come Wednesday night.
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.