Norma Dumont vs. Ailin Perez: women's bantamweight prelim preview at UFC Fight Night: Rosas Jr. vs. Barcelos

The setup

UFC Fight Night: Rosas Jr. vs. Barcelos lands on Saturday, September 26, 2026 at Meta APEX in Las Vegas, and on the prelims sits Norma Dumont (13-3-0) against Ailin Perez (13-2-0) at women's bantamweight, scheduled for three rounds.

The card carries 11 bouts in our tables, with this pairing on the prelims. The bout is listed as announced in the PropBetEdge schedule.

The question this preview works through is simple: does either side bring a measurable edge, or is this a matchup the data leaves open? UFC Stats career averages are on file for both fighters, and the archive holds 12 completed UFC bouts for Norma Dumont and 7 completed UFC bouts for Ailin Perez.

Tale of the tape

• Record: Norma Dumont 13-3-0 · Ailin Perez 13-2-0
• Age: Norma Dumont 35 · Ailin Perez 31
• Height: Norma Dumont 5'7" · Ailin Perez 5'5"
• Reach: Norma Dumont 67" · Ailin Perez 66"
• Stance: Norma Dumont Orthodox · Ailin Perez Switch
• Listed weight: Norma Dumont 135 lbs · Ailin Perez 136 lbs

Reach is close to even (67" to 66"), so neither fighter starts with a length edge and the striking exchanges begin from the same distance. Ailin Perez is listed as a switch-stance fighter, so her lead side can change through the fight and the opponent's setups have to work in both directions.

Recent form

Our archive has 12 completed UFC bouts for Norma Dumont, 9 wins and 3 losses. None of those wins came inside the distance, a pattern that leans toward the judges. She has been finished once in the archive. She last fought on Apr 25, 2026 and lost to Joselyne Edwards by unanimous decision in round 3. That puts her 154 days out by fight night.

• L vs Joselyne Edwards — unanimous decision, R3 (Apr 25, 2026, UFC Fight Night: Sterling vs. Zalal)
• W vs Ketlen Vieira — split decision, R3 (Nov 1, 2025, UFC Fight Night: Garcia vs. Onama)
• W vs Irene Aldana — unanimous decision, R3 (Sep 14, 2024, UFC 306: Riyadh Season Noche UFC)
• W vs Germaine de Randamie — unanimous decision, R3 (Apr 6, 2024, UFC Fight Night: Allen vs. Curtis 2)
• W vs Chelsea Chandler — unanimous decision, R3 (Jul 15, 2023, UFC Fight Night: Holm vs. Bueno Silva)

Our archive has 7 completed UFC bouts for Ailin Perez, 6 wins and 1 loss. 1 of those wins came inside the distance (1 by submission), a 17% finish rate on archived wins. She has been finished once in the archive, every loss ending early. Most recently she beat Macy Chiasson by unanimous decision in round 3 on Feb 28, 2026. That puts her 210 days out by fight night.

• W vs Macy Chiasson — unanimous decision, R3 (Feb 28, 2026, UFC Fight Night: Moreno vs. Kavanagh)
• W vs Karol Rosa — unanimous decision, R3 (Jan 18, 2025, UFC 311: Makhachev vs. Moicano)
• W vs Daria Zhelezniakova — submission, R1 (Sep 28, 2024, UFC Fight Night: Moicano vs. Saint Denis)
• W vs Joselyne Edwards — unanimous decision, R3 (Jun 1, 2024, UFC 302: Makhachev vs. Poirier)
• W vs Lucie Pudilova — unanimous decision, R3 (Nov 18, 2023, UFC Fight Night: Allen vs. Craig)

Both archives lean toward decisions (0% and 17% of wins finished), which points the other way on the distance question.

Style and statistical matchup

Norma Dumont lands 3.85 significant strikes per minute at 50% accuracy; Ailin Perez lands 2.88 at 56%. The two are close on volume, so neither side can expect to win rounds on activity alone. On the other side of the exchange, Norma Dumont absorbs 2.33 per minute with 64% striking defence and Ailin Perez absorbs 1.58 with 56%. Norma Dumont's 8-point defence edge is the number to hold against the pace figures: it decides how much of the opponent's output actually lands.

On the ground, Norma Dumont averages 1.43 takedowns per 15 minutes at 54% accuracy and defends 71% of attempts against her; Ailin Perez averages 4.9 at 49% and defends 72%.

All of these are career-to-date UFC Stats snapshots at capture, not as-of figures for this bout: they describe each fighter across every opponent, which is why the archive form above is read alongside them rather than replaced by them.

Round-level UFC Stats exist for 36 archived rounds of Norma Dumont's: 687 of 1348 significant strikes landed (51%), 19.1 per round, 17 of 31 takedowns, 42:52 of control time and 2 knockdowns. Round-level UFC Stats exist for 18 archived rounds of Ailin Perez's: 256 of 455 significant strikes landed (56%), 14.2 per round, 29 of 59 takedowns, 39:36 of control time and 1 knockdown. Those samples are small and uneven, so they colour the career averages rather than override them.

What could break the angle

Start with what is missing. Career averages are career-to-date snapshots at capture; they include fights outside this matchup context and are not as-of figures. There is also no odds snapshot in PropBetEdge data for this bout, so nothing above can be checked against a market yet; the read describes what to look for, not where value sits. A late weigh-in miss, a replacement or a change in scheduled rounds would each invalidate parts of it.

Final read

On the data, neither fighter carries a material edge into this one; the tape is close and the archive does not separate them. The uncertainty is ordinary fight variance rather than missing data. What to monitor: the three-round format holding, the weigh-in, and once a price exists, where the fight goes the distance market opens relative to this read. No model price or market line exists in PropBetEdge data for this bout, so this is not a pick; the Bettor's Edge panel above carries the impact score and the markets connected to the evidence.

Matchup page: Norma Dumont vs. Ailin Perez · Full card: UFC Fight Night: Rosas Jr. vs. Barcelos · Fighter pages: Norma Dumont, Ailin Perez.