UFC 292 full results: O'Malley upsets Sterling; Zhang dominates Lemos

Aljamain Sterling's nine-fight winning streak and his run as UFC bantamweight champion came to a sudden end Saturday when Sean O'Malley knocked him out in the second round with a crushing counter right hand and some ground-and-pound.

Sterling threw a left that O'Malley dodged and then threw a blistering straight right that landed on the chin. Sterling went down in the center of the Octagon and O'Malley landed punches from the top until referee Marc Goddard stopped it 51 seconds of Round 2. The win, in the main event of UFC 292 in Boston, came after a slow-paced first round. [Full recap.]

Here's how UFC 292 unfolded:

UFC 292 - Main card results, highlights

• Bantamweight championship: Sean O'Malley def. Aljamain Sterling by TKO (ground and pound) at 0:51 of R2:

• Women's strawweight championship: Zhang Weili def. Amanda Lemos by unanimous decision (50-43, 50-44, 49-45)
• Welterweight: Ian Machado Garry def. Neal Magny by unanimous decision (30-26, 30-26, 30-24)
• Bantamweight: Mario Bautista def. Da'Mon Blackshear by unanimous decision (29-28, 29-28, 30-27)
• Bantamweight: Marlon Vera def. Pedro Munhoz by unanimous decision (30-27, 30-27, 29-28)

UFC 292 - Prelims card results, highlights

• Middleweight: Brad Tavares def. Chris Weidman by unanimous decision (30-27, 30-27, 30-27)
• Middleweight: Gregory Rodrigues def. Denis Tiuliulin by KO (ground-and-pound) at 1:43 of R1:

• Lightweight: Kurt Holobaugh def. Austin Hubbard by submission (triangle choke) at 2:39 of R2
• Bantamweight: Brad Katona def. Cody Gibson by unanimous decision (29-28, 29-28, 30-27)

UFC 292 - Early prelims card results, highlights

• Middleweight: Andre Petroski def. Gerald Meerschaert by split decision (29-28, 28-29, 29-28)
• Women's flyweight: Natalia Silva def. Andrea Lee by unanimous decision (30-27, 30-27, 30-27)
• Women's flyweight: Karine Silva def. Maryna Moroz by submission (guillotine) at 4:59 of R1: