With another action-packed month of MMA in the books, MMAjunkie takes a look at the best knockouts from May. Here are the five nominees, listed in chronological order, and the winner of MMAjunkie’s “Knockout of the Month” for May 2015.

At the bottom of the post, let us know if we got it right by voting for your choice.

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The Nominees

Ben Nguyen def. Alptekin Ozkilic via punches at UFC Fight Night 65

Ben Nguyen (14-5 MMA, 1-0 UFC) was seen as a live underdog heading into his UFC Fight Night 65 bout with flyweight Alptekin Ozkilic (9-4 MMA, 1-3 UFC). With one second left in the first round, he showed why. During a striking exchange, Nguyen pressured Ozkilic back to the cage and threw heavy strikes. A left hand to the chin dropped Ozkilic and allowed Nguyen to flurry with strikes and get the finish just before the round expired.

Daniel Hooker def. Hatsu Hioki via head kick, punches at UFC Fight Night 65

Longtime featherweight contender Hatsu Hioki (27-9-2 MMA, 3-5 UFC) lasted 37 pro fights before he experienced a knockout loss. Daniel Hooker (12-5 MMA, 2-1 UFC) finally found Hioki’s sweet spot at UFC Fight Night 65 when he landed a vicious head kick that wobbled the Japanese fighter. Hioki attempted to recover from the impact, but Hooker showed impressive finishing instincts by landing a series of accurate shot on the way down that left his opponent face down on the mat in the second round.

Robert Whittaker def. Brad Tavares via punches at UFC Fight Night 65

Robert Whittaker (14-4 MMA, 5-2 UFC) earned the most significant victory of his career when he ran through middleweight veteran Brad Tavares (13-4 MMA, 8-4 UFC) like no other opponent before him. Tavares has been defeated, and even stopped, in the past, but no one has put it on the Hawaiian quite like Whittaker did when he landed a series of punishing right hands to end the UFC Fight Night 65 bout with a 44-second knockout.

Virgil Zwicker def. Razak Al-Hassan via uppercut at Bellator 137

Bellator MMA fan favorite Virgil Zwicker (14-4-1 MMA, 3-1-1 BMMA) shined when presented with the opportunity to compete in front of a hometown crowd in Temecula, Calif. He was victorious with a first-round knockout of light heavyweight Razak Al-Hassan (12-5 MMA, 0-1 BMMA). Al-Hassan’s cardio failed after just a few minutes of action, and Zwicker took advantage. “Rezdog” hurt Al-Hassan with a series of strikes then closed the show with a right-hook, uppercut combination.

Darren Till def. Wendell Oliveira via elbows at UFC Fight Night 67

Darren Till (13-0 MMA, 1-0 UFC) didn’t lack confidence coming into his UFC debut against Wendell Oliveira (24-9 MMA, 0-2 UFC). In a position that doesn’t lead to many finishes, Till threw and landed a blistering series of elbows from half-guard that left Oliveira unconscious early in the second round.

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The Winner: Daniel Hooker

Hioki seemed a little too nonchalant about eating Hooker’s head kicks in the first round of their May 10 bout.

In the second round, Hooker made him pay with a brutal knockout that left Hioki facedown and unconscious on the mat at the 4:13 mark of Round 2.

The head kick was there for Hooker early on, but instead of hurting Hioki with it, he mostly ended up giving the Japanese fighter a way of taking him down. But even on the mat, Hooker quickly showed that he could hold his own. After getting mounted by Hioki in the first, Hooker escaped with relative ease.

He began to shrug off some of those takedown attempts in the second, just as he also began to find his range on the feet.

Late in the second, Hooker put his shin across Hioki’s jaw. It stunned him just long enough to allow Hooker to unload with followup punches that sent Hioki reeling toward the mat.

As Hioki attempted to regain his bearings, a right hand from Hooker laid him flat. Another added insult to injury and set up MMAjunkie’s “Knockout of the Month.”