Santiago Ponzinibbio finds himself in a tug of war with Father Time as he tries to plot a late-career course as a mixed martial artist in his late 30s.

The American Top Team mainstay will attempt to get back on track in the Ultimate Fighting Championship welterweight division when he locks horns with Carlston Harris in the UFC Fight Night 249 co-main event on Saturday at the UFC Apex in Las Vegas. Ponzinibbio steps back into the spotlight having lost four of his past five bouts. He last competed at UFC on ESPN 59, where he wound up on the short side of a split decision against Muslim Salikhov on July 13. Harris, meanwhile, has compiled a 4-2 mark since he joined the UFC roster in 2021. The former Brave Combat Federation champion last saw action on May 18, when Kalinn Williams felled him with punches just 90 seconds into their UFC Fight Night 241 pairing.

As Ponzinibbio and Harris move ever closer to their looming showdown at 170 pounds, a look at some of the numbers that have accompanied them to this point:

38: Years of age for Ponzinibbio, who was born on Sept. 26, 1986 in La Plata, Argentina.

16: Ponzinibbio wins by knockout or technical knockout, accounting for 55% of his career total (29). His list of UFC victims: Alex Morono, Neil Magny, Gunnar Nelson, Court McGee, Andreas Stahl and Wendell de Oliveira Marques. Ponzinibbio owns sixth other wins by submission (21%) and seven more by decision (24%).

300,000: Dollars in post-fight bonuses banked by Ponzinibbio across his 18 appearances in the UFC. He has been awarded “Performance of the Night” and “Fight of the Night” three times each.

121: Significant strikes landed by Ponzinibbio in his three-round unanimous decision over Miguel Baeza at UFC Fight Night 189 on June 5, 2021. It established a personal high-water mark for the “Argentine Dagger” that still stands.

169: Combined victories between the eight men—Salikhov, Kevin Holland, Michel Pereira, Geoff Neal, Jingliang Li, Lorenz Larkin, Ryan LaFlare and Leonardo Mafra Teixeira—who have beaten Ponzinibbio. They boast a .732 cumulative winning percentage at 169-62.

37: Years of age for Harris, who was born in Skeldon, Guyana, on July 9, 1987.

6: Harris victories by submission, accounting for 32% of his career total (19). His methods of choice: three anaconda chokes, two arm-triangle chokes and one brabo choke. Harris holds five other wins by knockout or technical knockout (26%) and eight more by decision (42%).

91: Seconds needed for Harris to put away Wellington Vicente with an arm-triangle choke under the Skull Fighting Championship banner on Aug. 20, 2016. More than eight years later, it remains his fastest finish to date.

56: Rounds started by Harris as a professional mixed martial artist. He has gone the distance on 11 different occasions and carries an 8-3 record in those bouts.

.782: Cumulative winning percentage between the six men—Williams, Shavkat Rakhmonov, Jarrah Al-Silawi, Julio Cesar Andrade, Fernando Bruno and Christiano Marques—who have defeated Harris. They sport a combined record of 98-27-1.