Undaunted, Argüello put together another streak of wins, and found himself contending for the WBA featherweight, this time against Olivares in the latter's first defense. The fight took place at The Forum in Inglewood on November 23, 1974. After Olivares had built a small lead on the judges' scorecards, Argüello and Olivares landed simultaneous left hooks in round thirteen. Olivares's left hand caused a visible expression of pain on Argüello's face, but Argüello's left hand caused Olivares to crash hard against the canvas. A few seconds later, Argüello was the new featherweight champion of the world.