What to know

• Heavyweight Sean Sharaf pulled off the biggest upset in UFC history when he knocked out Gable Steveson in just 12 seconds at UFC 331. Sharaf stormed across the cage and caught Steveson with a massive left hook that immediately knocked him out cold for the bigg...S1
• Sean Sharaf turned a double-digit underdog role into a 12-second knockout of Gable Steveson at UFC 331 in Los Angeles. The left hook ended the Olympic gold medalist's unbeaten MMA run and gave Sharaf his first UFC win after two straight losses.S2