Read this description from the Cubs website on how a three-way tie between the Cubs, Giants and Astros for the Wild Card would be broken:
If the three tied clubs have identical records against one another in the regular season, the Office of the Commissioner shall supervise a draw that results in the clubs being designated Club A, Club B and Club C.
If the tied clubs do not have identical records against one another in the champoinship season, they will be designated Club A, Club B and Club C based on their records in head-to-head competition during the championship season as follows:
If Club 1 has a better record against each of Clubs 2 and 3, and Club 2 has a better record against Club 3, then Club 1 shall choose a designation as Club A, Club B or Club C. Club 2 shall choose a designation from the remaining two designations, and Club 3 shall be assigned the remaining designation.
If Club 1 has a better record against each of Clubs 2 and 3, and Club 2 and Club 3 have the same record against each other, then Club 1 shall choose a designation as Club A, Club B or Club C. The Office of the Commissioner shall supervise a draw between Clubs 2 and 3, the winner of which shall choose one of the remaining two designations. The remaining club shall be assigned the remaining designation.
If Club 1 and Club 2 have the same record against each other but each has a better record against Club 3, then the Office of the Commissioner shall supervise a draw between Clubs 1 and 2, the winner of which shall choose a designation as Club A, Club B or Club C. The club losing the draw shall choose a designation from the remaining two designations. Club 3 shall be assigned the remaining designation.
If Club 1 has a better record against Club 2, Club 2 has a better record against Club 3, and Club 3 has a better record against Club 1, then the three clubs shall be ranked on the basis of overall winning percentage within that three-club group, and the club with the highest winning percentage from among that three-club group shall have first choice among designations as Club A, Club B or Club C. The club with the next-highest winning percentage among the group shall have the next choice between the two remaining designations, and the club with the lowest winning percentage shall be assigned the remaining designation. If two or more of the clubs within this three-club group have the same winning percentage among the group, the Office of the Commissioner shall supervise a draw between the clubs so tied to determine priority of selection among the designations.
Club A shall play Club B at the ballpark of Club A on Monday. The following day, the winner of the first game shall be the home club in a second game against Club C. The winner of the game between Club C and the club that won the Club A-Club B game shall be declared the [division] champion.
It might take them a week just to figure this out. I'd love to be in Bud Selig's office when this sort of thing is going on.
Incidentally, here are the head-to-head records of the three teams:
Cubs 10 wins, Astros 9 wins
Giants 4 wins, Cubs 2 wins
Giants 4 wins, Astros 2 wins
As best I can read the eye-glazing text above, that would make the Giants "Club 1", the Cubs "Club 2", and the Astros "Club 3".
Keep the faith.
If the three tied clubs have identical records against one another in the regular season, the Office of the Commissioner shall supervise a draw that results in the clubs being designated Club A, Club B and Club C.
If the tied clubs do not have identical records against one another in the champoinship season, they will be designated Club A, Club B and Club C based on their records in head-to-head competition during the championship season as follows:
If Club 1 has a better record against each of Clubs 2 and 3, and Club 2 has a better record against Club 3, then Club 1 shall choose a designation as Club A, Club B or Club C. Club 2 shall choose a designation from the remaining two designations, and Club 3 shall be assigned the remaining designation.
If Club 1 has a better record against each of Clubs 2 and 3, and Club 2 and Club 3 have the same record against each other, then Club 1 shall choose a designation as Club A, Club B or Club C. The Office of the Commissioner shall supervise a draw between Clubs 2 and 3, the winner of which shall choose one of the remaining two designations. The remaining club shall be assigned the remaining designation.
If Club 1 and Club 2 have the same record against each other but each has a better record against Club 3, then the Office of the Commissioner shall supervise a draw between Clubs 1 and 2, the winner of which shall choose a designation as Club A, Club B or Club C. The club losing the draw shall choose a designation from the remaining two designations. Club 3 shall be assigned the remaining designation.
If Club 1 has a better record against Club 2, Club 2 has a better record against Club 3, and Club 3 has a better record against Club 1, then the three clubs shall be ranked on the basis of overall winning percentage within that three-club group, and the club with the highest winning percentage from among that three-club group shall have first choice among designations as Club A, Club B or Club C. The club with the next-highest winning percentage among the group shall have the next choice between the two remaining designations, and the club with the lowest winning percentage shall be assigned the remaining designation. If two or more of the clubs within this three-club group have the same winning percentage among the group, the Office of the Commissioner shall supervise a draw between the clubs so tied to determine priority of selection among the designations.
Club A shall play Club B at the ballpark of Club A on Monday. The following day, the winner of the first game shall be the home club in a second game against Club C. The winner of the game between Club C and the club that won the Club A-Club B game shall be declared the [division] champion.
It might take them a week just to figure this out. I'd love to be in Bud Selig's office when this sort of thing is going on.
Incidentally, here are the head-to-head records of the three teams:
Cubs 10 wins, Astros 9 wins
Giants 4 wins, Cubs 2 wins
Giants 4 wins, Astros 2 wins
As best I can read the eye-glazing text above, that would make the Giants "Club 1", the Cubs "Club 2", and the Astros "Club 3".
Keep the faith.