Random thought: have two teams that were playing each other ever clinched on the same day and both partied in the clubhouse afterwards? Unlikely but possible scenarios are the Cubs and Pirates clinching on the same day while playing each other. In the very unlikely department is the Cubs and Royals clinching on the same day while playing each other. If it were two teams clinching spots they're pretty much locked into, and they played each other the next day, you could see some really interesting lineups.