UFC 331 live blog: Gable Steveson vs. Sean Sharaf

Sean Sharaf produced one of the biggest upsets in UFC history at UFC 331, knocking out undefeated heavyweight prospect Gable Steveson in just 12 seconds of round one with a perfectly-timed 1-2 combination.

Steveson (4-0) had been positioned as one of the most highly touted heavyweight prospects in recent memory, coming off a first-round knockout over Elisha Ellison in his UFC debut last July. The 26-year-old boasts an Olympic gold medal in freestyle wrestling from the 2020 Tokyo Games and back-to-back NCAA Division I championships in 2021 and 2022, making him widely projected as a future title contender.

Sharaf (4-2), a 33-year-old former U.S. Marine, had struggled to find success in the octagon despite opening his professional career with four first-round knockout victories. He entered this bout having suffered back-to-back second-round finishes—losses to Junior Tafa and Steven Asplund, the latter earning a Fight of the Night bonus.

With the flash knockout, Sharaf announced his arrival as a dangerous heavyweight, delivering a signature "I'm not surprised, motherf*ckers!" callout to the crowd at Crypto.com Arena in Los Angeles before thanking his supporters from his native Santa Ana, California. The victory likely repositions Sharaf in the heavyweight conversation while raising serious questions about Steveson's development curve at the elite level.