This could happen in the wild card race with 3 games left.
Scenario: Three-team tie for one Wild Card spot
If, for example, the Yankees were in the top Wild Card spot and the Blue Jays, Red Sox and Mariners were all tied for the second spot, the three tied teams would choose/receive A, B and C designations. Club A would host Club B on Monday, Oct. 4. The winner of that game would then host Club C on Tuesday to determine the second Wild Card spot. The AL Wild Card Game would be pushed back from Tuesday in this scenario.