If I understand the formula, but I probably don't, the wild card team can not play a team from its' own division in the 1st round, so giving the Yankees the East, that means between the M's, A,s, and BoSox will come the wildcard. I believe the team with the best record plays the wildcard so we will get the other division winner.
Oakland is making another great end of the season charge and I believe they will win the West and have the best AL record. The M's will beat the Red Sox for the wildcard setting up a Sox-A's, Mariner's Yankees 1st round.