10/3:
We've made it to the final day of the season, and six teams still have something to play for.
Teams who are locked into spots and do not, are Tampa Bay, Houston, and the Sox as division winners in the AL and 1, 2, and 3 seeds respectively. Milwaukee and Atlanta as division winners in the NL and 2 and 3 seeds respectively. Saint Louis as the second wild card.
San Francisco and the LA Dodgers have been locked into the postseason for a long time, but their positions are yet to be settled. A Dodgers win + a Giants loss gives us a Monday tiebreaker with the winner being NL west champs and #1 seed, and the loser being the first wild card. Any other pair of outcomes today gives the Giants the NL West title.
Now to the AL wild card which has lived up to the "wild" to the fullest extent. As we enter play today, Boston and the NY Yankees are tied for the two WC positions with Toronto and Seattle one game back. Any combination of those four teams could ultimately fill the two wild card slots. In any scenario, Boston and the Yankees are both guaranteed to play at least one more game today, whether that be in the wild card game or a tiebreaker game. All games start between 2:00 and 2:30 today so that no team gets the advantage of knowing an outcome before playing.
All the possible outcomes [TLDR version: 9 of the 16 possible outcomes have tiebreaker game(s)]:
Boston and Yankees both win, regardless of Toronto or Seattle outcomes - Boston is the first WC and the Yankees are the second WC
All four teams lose - Boston is the first WC and Yankees are the second WC
Boston wins, other three lose - Boston is first WC and Yankees are second WC
Yankees win, other three lose - Yankees are first WC and Boston is second WC
Boston and Toronto win, other two lose - Boston is first WC and Toronto and Yankees are tied for second WC
Boston and Seattle win, other two lose - Boston is first WC and Seattle and Yankees are tied for second WC
Yankees and Toronto win, other two lose - Yankees are first WC and Toronto and Boston are tied for second WC
Yankees and Seattle win, other two lose - Yankees are first WC and Seattle and Boston are tied for second WC
All but Boston win - Yankees are the first WC and the other three are tied for the second WC
All but Yankees win - Boston is the first WC and the other three are tied for the second WC
Seattle wins, other three lose - Boston, Yankees and Seattle tie for both WC spots
Toronto wins, other three lose - Boston, Yankees and Toronto tie for both WC spots
Seattle and Toronto win, Boston and Yankees lose - All four are tied for both WC spots