On the morning of September 11 the Tigers had a 9.5 game lead with 16 games to play. By the evening of September 20, the Tigers have a 1.0 game lead with 7 games to play. By my count, starting Thursday September 11 through the end of today, there will have been 16 games that have impacted the division race and 15 have gone against the Tigers. Only exception is in bold.
Thursday September 11
Cleveland beats KC
Detroit loses to NY Yankees
Friday September 12
Cleveland beats Chicago White Sox
Detroit loses to Miami
Saturday September 13
Cleveland beats Chicago White Sox
Detroit loses to Miami
Sunday September 14
Cleveland beats Chicago White Sox
Detroit beats Miami
Tuesday September 16
Cleveland beats Detroit
Wednesday September 17
Cleveland beats Detroit
Thursday September 18
Cleveland beats Detroit
Friday September 19
Detroit loses to Atlanta
Cleveland beats Minnesota
Saturday September 20
Detroit loses to Atlanta
Cleveland beats Minnesota
Cleveland beats Minnesota