With that being said, the most likely scenario pending the Jays win tomorrow, is the Sox will beat the Nationals (securing their spot regardless of any other games)
And the Yankees will probably lose to the Rays (based on everything we’ve seen this season, up to this point)
The Jays would then be tied with the Yankees for the final wild card spot, and pending the Mariners win their next 2 games, it could be either the Jays and Yankees in a winner makes the WC, loser goes home game, or a three way tie if the Mariners win their next games, where as the tie breaker system is based on how each team performed against the other..
the breakdown is here —->
https://www.sportsnet.ca/mlb/article/needs-happen-blue-jays-reach-playoffs/Essentially, the team with the best record vs the other teams overall will get to choose if they want to be team A, B, or C. Then the team with the next best record vs the others chooses which team they want to be (remaining out of A, B, C) and the team that has the worst record vs the other two opponents, would take whichever A, B, C is left.
A hosts B on Monday
Winner advances in the tie breaking round, loser goes home
Winner hosts C on Tuesday, winner wins the tie breaking round, loser goes home
Team C would have an advantage as they only have to win one game opposed to two, but they would have to play that game on the road.