What happens if two or more team rank the last post season qualifying standing together?

SDS

Hi, show lovers.
We, 10, are preparing for a new custom league.
Setting is, 4 teams can enjoy Post Season.
I wonder what happens if two or more team rank the 4th standing together?(with the same number of wins and losses.)
Does SHOW provide one more additional match to them just like real MLB?
Otherswise, how does SHOW decide which team would advance?
Does it consider head to head match results?

SDS

Runs Allowed and Runs Scored are the tiebreaker