What if there's a 3 way tie ? (MLB question)

The National League Central division has three teams still in the thick of it. The Cardinals, the Pirates, and the Reds. Obviously one of those teams will win the division, but it appears that that division will send the wild card to the playoffs as well. What would happen if there was a three way tie for the division win? How would they do an inter-league playoff for the number one spot and the wild card between the three teams?

Back-to-back elimination games.

How do they pick the first two teams to play and what are they playing for? The division title or the wild card?

They posted an article last week with about every possible combination of tie-breakers:

What about a 6 team tie?