The lights seem destined to go out on someone—a common occurrence in the volatile Ultimate Fighting Championship heavyweight division.

Game-changing punching power will be on the menu when Derrick Lewis meets Sergei Pavlovich in a featured UFC 277 attraction on Saturday at the American Airlines Center in Dallas. The two behemoths have combined for 20 first-round knockouts. Lewis has followed a four-fight winning streak by losing two of his past three bouts. He last appeared at UFC 271, where he was short-circuited by a Tai Tuivasa elbow strike in the second round of their Feb. 12 encounter. Pavlovich, meanwhile, enters the cage with the wind of a three-fight winning streak in his sails. He last competed on March 19, when he dispatched Shamil Abdurakhimov with punches in the first round of their UFC Fight Night 204 pairing.

As Lewis and Pavlovich creep ever closer to their upcoming battle, a look at some of the numbers that have accompanied them to this point:

37: Years of age for Lewis, who was born in New Orleans on Feb. 7, 1985.

21: Lewis wins by knockout or technical knockout, accounting for 81% of his career total (26). His list of UFC victims: Abdurakhimov, Chris Daukaus, Curtis Blaydes, Alexey Oleynik, Alexander Volkov, Marcin Tybura, Travis Browne, Gabriel Gonzaga, Damian Grabowski, Viktor Pesta, Ruan Potts and Guto Inocente. Lewis holds one other win by submission (4%) and four more by decision (15%).

46: Seconds needed for Lewis to maul Jay Peche with punches at an Immortal Kombat Fighting show on Sept. 3, 2011. Having occurred more than a decade ago, it remains his fastest finish to date.

13: Consecutive calendar years in which Lewis has fought at least once. In addition to his 0-1 mark in 2022, Lewis went 3-1 in 2010, 3-1 in 2011, 2-0 with one no contest in 2012, 1-0 in 2013, 2-1 in 2014, 2-1 in 2015, 4-0 in 2016, 1-1 in 2017, 3-1 in 2018, 1-1 in 2019, 2-0 in 2020 and 2-1 in 2021.

128: Combined victories between the eight men—Tuivasa, Ciryl Gane, Junior dos Santos, Daniel Cormier, Mark Hunt, Shawn Jordan (twice), Matt Mitrione and Tony Johnson —who have beaten Lewis. They boast a .696 cumulative winning percentage (128-55-1).

30: Years of age for Pavlovich, who was born on May 13, 1992 in Orlovsky, Russia.

12: Pavlovich victories by knockout or technical knockout, accounting for 80% of his career total (15). He victimized his first six opponents as a professional, all of them inside one round. Pavlovich owns three other victories by decision (20%).

3: Sub-minute finishes on the Pavlovich resume. He buried Sergey Buinachev with punches in 20 seconds at Fight Nights Global “Cup of Moscow” on March 21, 2015, punched out Vladimir Daineko in 24 seconds at FNG “Sochi” on July 31, 2015 and brought down Sultan Murtazaliev with punches in 59 seconds at FNG “Dagestan” on Sept. 25, 2015.

5: Countries in which Pavlovich has competed as a mixed martial artist. He has gone 12-0 in his native Russia, 1-0 in Slovakia, 1-0 in Singapore, 1-0 in England and 0-1 in China.

.702: Cumulative winning percentage between the three men—Abdurakhimov, Maurice Greene and Marcelo Golm—Pavlovich has defeated since he joined the UFC roster in 2018. They sport a combined record of 40-17.