Calvin Kattar vs. Arnold Allen: Height, weight, reach and UFC records comparison

Calvin Kattar and Arnold Allen will clash in the main event of UFC Vegas 63. Kattar is the No. 5-ranked featherweight contender, while Arnold Allen sits at No. 6 on the UFC's 145-pound ladder.

The fight will mark the 12th octagon appearance for America's Kattar, while his British counterpart Allen will make his 10th outing in the promotion.

Calvin Kattar made his UFC debut against Andre Fili at UFC 214. He won the fight via unanimous decision. He has a UFC record of 7-4, with decision losses to Renato Moicano, Zabit Magomedsharipov, Max Holloway and Josh Emmett. Calvin Kattar has an overall MMA record of 23-6.

'The Boston Finisher' last weighed in at 146 pounds for his bout against Josh Emmett. He stands at 5'11" (180 cm) and has a reach of 72 inches. His last fight against Emmett at UFC Austin resulted in a split decision loss.

Arnold Allen, meanwhile, debuted at UFC Fight Night 69 against Alan Omer. He won the fight via submission due to a guillotine choke in the third round. Allen is currently undefeated in the UFC, winning all nine fights. He has an overall MMA record of 18-1.

'Almighty' last weighed in at 146 pounds against Dan Hooker at March's UFC London event. He won the fight via TKO in the first round, finishing the New Zealander with punches and elbows. Allen is currently on a 11-fight win streak in his MMA career.

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Calvin Kattar vs. Arnold Allen: Who takes the win?

Allen has been on an absolute tear in his UFC run. He has had three Performance of the Night bonuses in his octagon tenure. He showed his grappling ability in his wins against Mads Burnell and Alan Omer, but he is primarily a striker who holds a purple belt in Brazilian jiu-jitsu.

Kattar, on the other hand, is a game fighter with some of the best boxing in the UFC. Kattar has had numerous finishes via KO/TKO. Kattar has been in five fights that were deemed Fight of the Night, even if three of those fights were losses for him. In the UFC, he has only lost against high-ranked featherweights.

Calvin Kattar stopped the momentum of fighters like Shane Burgos, Dan Ige and Giga Chikadze, who were on five or six-fight undefeated streaks. Will Calvin Kattar be able to stop Arnold Allen in his tracks? We'll have to wait and see.