The Yankees came in 2.5 games behind Texas in the AL wild card race and lost for the eighth time in 12 games. The Yankees have 11 games remaining.
Dickey (13-12) allowed four hits, walked two and struck out eight.
The knuckleballer retired the final 11 batters he faced and 15 of the last 16.
Dickey has not lost since the Yankees beat him in the Bronx on Aug. 21. He is 4-0 with a 2.73 ERA in five starts since.
Sergio Santos pitched the eighth and Casey Janssen finished in the ninth for his 31st save in 33 chances.
In other AL action, it was:
‧ Indians 5, Royals 3
‧ Athletics 2, Angels 1
‧ White Sox 4, Twins 3
In interleague play, it was:
‧ Reds 10, Astros 0