Cleveland Indians First-Place Eliminiation Scenario
Cleveland must win 18 more games (31 total) to avoid elimination from first place.
Here are the final standings in a scenario in which Cleveland finishes in first place with 31 wins:

Team             W	L	PCT	GB
Cleveland        31	131	0.191	0.00
Chicago          31	131	0.191	0.00
Minnesota        31	131	0.191	0.00
Detroit          31	131	0.191	0.00
Kansas City      28	134	0.173	3.00

Tie breakers
Cleveland wins the series with Chicago 7 games to 6
Cleveland wins the series with Detroit 7 games to 6
Cleveland wins the series with Minnesota 7 games to 6

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Cleveland        13	6	143	0.684	0.0
Kansas City      12	7	143	0.632	1.0
Detroit          10	9	143	0.526	3.0
Minnesota        6	11	145	0.353	6.0
Chicago          3	15	144	0.167	9.5

Next, we show how the remaining series of games plays out in the scenario:

Chicago currently has 1 win(s) against Cleveland and 2 loss(es).
Chicago wins 5 additional game(s) against Cleveland and loses 5.
Chicago loses the series 6 games to 7.
Chicago wins 0 additional game(s) against teams outside the division and loses 105.

Chicago currently has 0 win(s) against Detroit and 3 loss(es).
Chicago wins 7 additional game(s) against Detroit and loses 3.
Chicago wins the series 7 games to 6.
Chicago wins 0 additional game(s) against teams outside the division and loses 105.

Chicago currently has 1 win(s) against Kansas City and 6 loss(es).
Chicago wins 3 additional game(s) against Kansas City and loses 3.
Chicago loses the series 4 games to 9.
Chicago wins 0 additional game(s) against teams outside the division and loses 105.

Chicago currently has 0 win(s) against Minnesota and 0 loss(es).
Chicago wins 13 additional game(s) against Minnesota and loses 0.
Chicago wins the series 13 games to 0.
Chicago wins 0 additional game(s) against teams outside the division and loses 105.

Cleveland currently has 0 win(s) against Detroit and 0 loss(es).
Cleveland wins 7 additional game(s) against Detroit and loses 6.
Cleveland wins the series 7 games to 6.
Cleveland wins 0 additional game(s) against teams outside the division and loses 96.

Cleveland currently has 0 win(s) against Kansas City and 0 loss(es).
Cleveland wins 1 additional game(s) against Kansas City and loses 12.
Cleveland loses the series 1 games to 12.
Cleveland wins 0 additional game(s) against teams outside the division and loses 96.

Cleveland currently has 2 win(s) against Minnesota and 0 loss(es).
Cleveland wins 5 additional game(s) against Minnesota and loses 6.
Cleveland wins the series 7 games to 6.
Cleveland wins 0 additional game(s) against teams outside the division and loses 96.

Detroit currently has 0 win(s) against Kansas City and 0 loss(es).
Detroit wins 12 additional game(s) against Kansas City and loses 1.
Detroit wins the series 12 games to 1.
Detroit wins 0 additional game(s) against teams outside the division and loses 98.

Detroit currently has 2 win(s) against Minnesota and 2 loss(es).
Detroit wins 0 additional game(s) against Minnesota and loses 9.
Detroit loses the series 2 games to 11.
Detroit wins 0 additional game(s) against teams outside the division and loses 98.

Kansas City currently has 1 win(s) against Minnesota and 2 loss(es).
Kansas City wins 0 additional game(s) against Minnesota and loses 10.
Kansas City loses the series 1 games to 12.
Kansas City wins 0 additional game(s) against teams outside the division and loses 101.

# Cleveland Indians' magic number
# Cleveland's magic number
# Indians' magic number
# MLB Playoff Race