- All eight of Katlyn Chookagian's UFC victories have been via decision. Her last finish was way back in 2016.
- Valentina Shevchenko remains the only woman to successfully defend the UFC Flyweight Championship
- Nicolas Dalby lost his way out of the UFC in 2016, and took a year and a half off before losing his next fight in Cage Warriors. Since that, he technically has no losses in his seven fights that followed. His only loss was overturned.
- Alan Jouban got his first decision win since December 2016, and his first win of any kind since February of 2018.
- Jouban's last two fights have been after layoffs of over a year.
- Antonina and Valentina Shevchenko competed on the same UFC card for the first time. Dan and Joe Lauzon, Dan and Jim Miller, Antonio Rodrigo and Antonio Rogerio Noguiera, Ildemar and Iuri Alcantara, Sergio and Anthony Pettis, Erick and Augusto Montano, David and Daniel Teymur have all done it before.
- None of those sibling duos both won their fights via finish.
- The Shevchenkos were the first female siblings to compete on the same card in UFC history.
- Mike Perry has no wins via submission in the UFC.
- Brandon Moreno is now unbeaten in his last five fights, and his last four UFC fights. He has only two losses across nine UFC bouts. He earned his first finish win in the UFC since April 2017.
- Brandon "Raw Dawg" Royval was finished for the first time in his MMA career at UFC 255.
- Shogun Rua's three-fight unbeaten streak was ended at UFC 255.
- Shogun's last fight in Las Vegas before UFC 255 was in PRIDE FC in 2007. He'd never competed in Las Vegas across 21 UFC fights.
- Paul Craig is now unbeaten in his last four fights.
- Cynthia Calvilo has never been stopped in her MMA career.
- Tim Means earned back-to-back wins for the first time since 2015-2016, and his first consecutive wins via decision since 2014. He's earned back-to-back wins over opponents who have missed weight by at least four pounds, as well.
- Valentina Shevchenko has four successful Flyweight title defenses.
- Deiveson Figueiredo has four straight finish victories.
- Deveison Figueiredo was the first person since October 2017 to successfully defend the UFC Flyweight title against someone who has competed in the division.
