UFC Fight Night: Rodríguez vs. Stephens (also known as UFC Fight Night 159 or UFC on ESPN+ 17) was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on September 21, 2019, at Mexico City Arena in Mexico City, Mexico.

[2][3] While not officially announced by the organization, the promotion was initially targeting a featherweight bout between former title challengers Brian Ortega and Chan Sung Jung to serve as the event headliner.

[4] However, promotion officials elected to go in another direction and a featherweight bout between The Ultimate Fighter: Latin America featherweight winner Yair Rodríguez and Jeremy Stephens served as the main event.

However, on August 12, it was reported that Nunes was removed from the card due to a failed drug test.

[9] Marion Reneau was scheduled to face Irene Aldana at the event.