Pantoja is one of five undisputed UFC flyweight champions.

Pantoja is one of four fighters in UFC history to force a title change by split decision when he won at UFC 290. Robbie Lawler, Henry Cejudo and Carla Esparza also accomplished the feat.

Pantoja’s 11 victories in UFC flyweight competition are third-most in divisional history behind Demetrious Johnson (13) and Joseph Benavidez (13).

Pantoja’s five-fight UFC winning streak at flyweight is the second-longest active streak in the division behind Muhammad Mokaev (six).

Pantoja’s six stoppage victories in UFC flyweight competition are tied for third-most in divisional history behind Deiveson Figueiredo (seven) and Johnson (seven).

Pantoja’s four submission victories in UFC flyweight competition are tied for second-most in divisional history behind Johnson (five).

Pantoja’s five fight-night bonus for UFC flyweight bouts are tied for third-most in divisional history behind Johnson (nine) and Brandon Moreno (seven).

Erceg can become the second Australian-born champion in UFC history. Alexander Volkanovski is the only fighter to accomplish the feat.

Jonathan Martinez vs. Jose Aldo

Jonathan Martinez’s (19-4 MMA, 10-3 UFC) five-fight UFC winning streak at bantamweight is the third-longest active streak in the division behind Merab Dvalishvili (nine) and Mario Bautista (six).

Martinez’s nine knockdowns landed in UFC bantamweight competition are tied for fifth-most in divisional history behind Marlon Vera (10), Petr Yan (10), Montel Jackson (10) and Cody Garbrandt (10).

Martinez is one of two fighters in UFC history to earn multiple leg kick TKO victories. Edson Barboza also accomplished the feat.

Jose Aldo (31-8 MMA, 13-7 UFC) returns to competition for the first time since Aug. 20, 2022. The 623-day layoff is the longest of his nearly 20-year career.

Aldo is the only two-time UFC featherweight titleholder in history and one of nine overall in company history to have two reigns in a single weight class.

Aldo is 3-3 since he dropped to the bantamweight division in December 2019.

Aldo’s average fight time of 18:04 in UFC bantamweight competition is the second-longest in divisional history behind Dominick Cruz (18:20).

Aldo’s 18 UFC/WEC featherweight victories are third-most in combined divisional history behind Max Holloway (20) and Cub Swanson (19).

Aldo’s 11 stoppage victories in UFC/WEC featherweight competition are tied with Holloway for most in combined divisional history.

Aldo’s 11 knockout victories in UFC/WEC featherweight competition are most in combined divisional history.

Aldo defends 89.3 percent of opponent takedown attempts in UFC bantamweight competition, the best rate among active fighters in the weight class.

Anthony Smith vs. Vitor Petrino

Anthony Smith (37-19 MMA, 12-9 UFC) is 8-6 since he moved up to the UFC light-heavyweight division in June 2018.

Smith has earned 33 of his 36 career victories by stoppage. That includes 11 of his 13 UFC wins.

Vitor Petrino’s (11-0 MMA, 4-0 UFC) four-fight UFC winning streak at light heavyweight is tied for the third-longest active streak in the division behind Carlos Ulberg (five) and Khalil Rountree (five).

Petrino has earned eight of his 10 career victories by stoppage. He’s finished seven of those wins by knockout.

Michel Pereira (29-11 MMA, 8-2 UFC) is 2-0 since he moved up to the middleweight division in October 2023.

Pereira’s seven-fight UFC winning streak is tied for fourth-longest among active fighters on the roster behind Islam Makhachev (13), Merab Dvalishvili (10) and Movsar Evloev (eight).

Ihor Potieria (20-5 MMA, 2-3 UFC) was successful in his middleweight debut at UFC Fight Night 236. He previously competed at light heavyweight.

Paul Craig (17-7-1 MMA, 9-7-1 UFC) is 1-1 since he dropped to the middleweight division in July 2023.

Craig’s six submission victories in UFC light heavyweight competition are second-most in divisional history behind Glover Teixeira (seven).

Craig’s four submission victories by triangle choke are the most in UFC history.

Craig’s victory at 4:59 of Round 3 at UFC Fight Night 127 is the latest submission in a three-round UFC fight.

Caio Borralho’s (15-1 MMA, 5-0 UFC) five-fight UFC winning streak at middleweight is the third-longest streak in the division behind Dricus Du Plessis (seven) and Brendan Allen (six).

Borralho has earned four of his five UFC victories by decision.

Borralho absorbs just 1.87 significant strikes per minute in UFC middleweight competition, the best rate among active fighters in the weight class.

Joanderson Brito(16-3-1 MMA, 4-1 UFC) has earned 14 of his 16 career victories by stoppage. That includes all four of his UFC wins.

Brito’s average fight time of 5:54 in UFC lightweight competition is the shortest among active fighters in the weight class.

Brito’s four-fight UFC stoppage streak is the second-longest active streak in the company behind Shavkat Rakhmonov (six).v

Karolina Kowalkiewicz (16-7 MMA, 9-7 UFC) competes in her 17th UFC strawweight bout, the third-most appearances in divisional history behind Angela Hill (23) and Randa Markos (18).

Kowalkiewicz’s nine victories in UFC strawweight competition are tied for fifth-most in divisional history behind Hill (10), Jessica Andrade (10), Joanna Jedrzejczyk (10) and Carla Esparza (10).

Kowalkiewicz’s four-fight UFC winning streak at strawweight is the second-longest active streak in the division behind Tatiana Suarez (six).

Kowalkiewicz has eight of her nine UFC victories by decision.

Drakkar Klose (14-2-1 MMA, 8-2 UFC)is one of 13 fighters in UFC history to earn a knockout stemming from a slam. He accomplished the feat at UFC on ESPN 52.

Vinc Pichel (14-3 MMA, 7-3 UFC) has earned six of his seven UFC victories by decision.

Pichel lands 54.6 percent of his takedown attempts in UFC lightweight competition, the third-highest rate among active fighters in the division behind Mike Davis (63.6 percent) and Makhachev (61.2 percent).

For more on the card, visit MMA Junkie’s event hub for UFC 301.

UFC research analyst and live statistics producer Michael Carroll contributed to this story. Follow him on X @MJCflipdascript.