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Julianna Pena

Women's Bantamweight · REAL v1.0 (registered) #8; v1.1 (shadow) #9

Descriptive profile. The resume rank is what has been earned; these statistics are context, not a prediction. A test on Oct 20, 2026 found that career statistics add nothing reliable to age, layoff and experience as predictors of the next result (experiments/REGISTER.md, EXP-2026-10-20-14).

Weight band 6-9: the 10th to 90th percentile of her position across weight vectors drawn near the 70/30 weights. Rating 1,577, deviation 141: measured from 12 UFC bouts; a one-bout newcomer sits near 290.

Age 37 (born 1989-08-19) · Height 5 ft 6 in (168 cm) · Reach 69 in (175 cm) · Stance Orthodox · 512 days since last bout (2025-06-07) · Last five 3-2 · Streak L1

Why she is ranked here

Rating 1,577 is the division's 11th highest of 24 board fighters after an inactivity penalty of 42 points for 512 days without a bout; the ledger stands at +2.8 (+3.8 from quality wins, less 1.0 for blowout losses; losses count for three years); 5 quality wins in 15 years, 5 over top-10 opponents, which makes her entrenched; no form penalty (3-2 last five). Score +0.18 = +0.04 (rating term, 70% weight) +0.13 (ledger term, 30% weight) -0.00 (form penalty); score order put her at #8.

TermValueDetail
Score+0.1870% rating term + 30% ledger term - form penalty
Rating term+0.04resume rating 1,577 (raw 1,619 less inactivity penalty 42), scaled against the division's interdecile range
Ledger term+0.13quality ledger +2.8: +3.8 QW +0.0 proof -1.0 blowout -0.0 weak
Form penalty0.00last five 3-2
Quality wins, 15 years55 over top-10 opponents, 5 over top-15; entrenched
Placementscore order #8v1.0 (registered)
Shadow board v1.1#9score +0.18; score order #8; placement rules -> #9

Rules, weights and worked examples: methodology.

Last ten bouts

DateEventOpponentOpp. official rankResultMethodRoundModel p
2025-06-07UFC 316: Dvalishvili vs. O'Malley 2 (title)Kayla Harrison#2Lsubmission2 (4:55)45%
2024-10-05UFC 307: Pereira vs. Rountree Jr. (title)Raquel PenningtonCWsplit decision5 (5:00)42%
2022-07-30UFC 277: Pena vs. Nunes 2 (title)Amanda Nunes#1Lunanimous decision5 (5:00)36%
2021-12-11UFC 269: Oliveira vs. Poirier (title)Amanda NunesCWsubmission2 (3:26)16%
2021-01-23UFC 257: Poirier vs. McGregorSara McMann#9Wsubmission3 (3:39)51%
2020-10-03UFC Fight Night: Holm vs. AldanaGermaine de Randamie#1Lsubmission3 (3:25)39%
2019-07-13UFC Fight Night: De Randamie vs. LaddNicco MontanounrankedWunanimous decision3 (5:00)56%
2017-01-28UFC on FOX: Shevchenko vs. PenaValentina Shevchenko#1Lsubmission2 (4:29)52%
2016-07-09UFC 200: Tate vs NunesCat Zingano#3Wunanimous decision3 (5:00)63%
2015-10-03UFC 192: Cormier vs GustafssonJessica Eye#6Wunanimous decision3 (5:00)66%

Opp. official rank = the UFC media-panel rank of the opponent on the date (C champion, #1 to #15, unranked; n/a before Feb 2013 or where no official board existed). Model p = the predictive model's pre-fight win chance for her (frozen performance-adjusted Elo; bouts before 2020 were in its tuning sample). Linked opponents have a profile.

Career statistics

Through 2026-10-31, UFC bouts only. Percentile = share of the 24 board fighters at Women's Bantamweight at or below this value; high is a position in the division, not a verdict.

Output
Significant strikes landed per minute3.10(33rd percentile at Women's Bantamweight)
Significant strike accuracy44%(25th percentile at Women's Bantamweight)
Knockdowns scored per 15 minutes0.00(46th percentile at Women's Bantamweight)
Share of wins by finish50%(67th percentile at Women's Bantamweight)
Defence and damage
Significant strikes absorbed per minute2.56(38th percentile at Women's Bantamweight)
Significant strike defence57%(54th percentile at Women's Bantamweight)
Knockdowns suffered per 15 minutes0.38(92nd percentile at Women's Bantamweight)
Significant strikes absorbed, career407(75th percentile at Women's Bantamweight)
KO/TKO losses0(62nd percentile at Women's Bantamweight)
Submission losses3(96th percentile at Women's Bantamweight)
KO/TKO losses per bout over 10 years, each weighted down by the finisher's danger0.000(62nd percentile at Women's Bantamweight)
Grappling
Takedowns landed per 15 minutes1.70(62nd percentile at Women's Bantamweight)
Takedown defence24%(9th percentile at Women's Bantamweight)
Share of cage time in control28%(62nd percentile at Women's Bantamweight)
Share of significant strikes landed in the clinch or on the ground38%(58th percentile at Women's Bantamweight)
Stylemixed (3.1 takedown attempts per 15 min; 28% control)
Career stage
Age37.2(92nd percentile at Women's Bantamweight)
Age at UFC debut24.3(12th percentile at Women's Bantamweight)
Years since UFC debut12.9(100th percentile at Women's Bantamweight)
UFC bouts12(75th percentile at Women's Bantamweight)
Cage time, minutes159(83rd percentile at Women's Bantamweight)
Bouts per year, last three years0.7(8th percentile at Women's Bantamweight)
Days since last bout512(100th percentile at Women's Bantamweight)

Board position since Oct 2023

C24681020252026Oct 2023Oct 20262023-10-06: #3, Women's Bantamweight2023-10-13: #3, Women's Bantamweight2023-10-20: #3, Women's Bantamweight2023-11-03: #3, Women's Bantamweight2023-11-10: #3, Women's Bantamweight2023-11-17: #3, Women's Bantamweight2023-12-01: #3, Women's Bantamweight2023-12-08: #3, Women's Bantamweight2023-12-15: #3, Women's Bantamweight2024-01-12: #4, Women's Bantamweight2024-01-19: #4, Women's Bantamweight2024-10-11: title holder, Women's Bantamweight2024-10-18: title holder, Women's Bantamweight2024-10-25: title holder, Women's Bantamweight2024-11-01: title holder, Women's Bantamweight2024-11-08: title holder, Women's Bantamweight2024-11-15: title holder, Women's Bantamweight2024-11-22: title holder, Women's Bantamweight2024-12-06: title holder, Women's Bantamweight2024-12-13: title holder, Women's Bantamweight2025-01-10: title holder, Women's Bantamweight2025-01-17: title holder, Women's Bantamweight2025-01-31: title holder, Women's Bantamweight2025-02-07: title holder, Women's Bantamweight2025-02-14: title holder, Women's Bantamweight2025-02-21: title holder, Women's Bantamweight2025-02-28: title holder, Women's Bantamweight2025-03-07: title holder, Women's Bantamweight2025-03-14: title holder, Women's Bantamweight2025-03-21: title holder, Women's Bantamweight2025-03-28: title holder, Women's Bantamweight2025-04-04: title holder, Women's Bantamweight2025-04-11: title holder, Women's Bantamweight2025-04-25: title holder, Women's Bantamweight2025-05-02: title holder, Women's Bantamweight2025-05-09: title holder, Women's Bantamweight2025-05-16: title holder, Women's Bantamweight2025-05-30: title holder, Women's Bantamweight2025-06-06: title holder, Women's Bantamweight2025-06-13: #1, Women's Bantamweight2025-06-20: #1, Women's Bantamweight2025-06-27: #1, Women's Bantamweight2025-07-11: #1, Women's Bantamweight2025-07-18: #1, Women's Bantamweight2025-07-25: #1, Women's Bantamweight2025-08-01: #1, Women's Bantamweight2025-08-08: #1, Women's Bantamweight2025-08-15: #1, Women's Bantamweight2025-08-22: #1, Women's Bantamweight2025-09-05: #1, Women's Bantamweight2025-09-12: #1, Women's Bantamweight2025-09-26: #1, Women's Bantamweight2025-10-03: #1, Women's Bantamweight2025-10-10: #3, Women's Bantamweight2025-10-17: #3, Women's Bantamweight2025-10-24: #3, Women's Bantamweight2025-10-31: #2, Women's Bantamweight2025-11-07: #3, Women's Bantamweight2025-11-14: #3, Women's Bantamweight2025-11-21: #3, Women's Bantamweight2025-12-05: #3, Women's Bantamweight2025-12-12: #3, Women's Bantamweight2026-01-23: #3, Women's Bantamweight2026-01-30: #3, Women's Bantamweight2026-02-06: #3, Women's Bantamweight2026-02-20: #3, Women's Bantamweight2026-02-27: #3, Women's Bantamweight2026-03-06: #3, Women's Bantamweight2026-03-13: #3, Women's Bantamweight2026-03-20: #3, Women's Bantamweight2026-03-27: #3, Women's Bantamweight2026-04-03: #2, Women's Bantamweight2026-04-10: #2, Women's Bantamweight2026-04-17: #2, Women's Bantamweight2026-04-24: #2, Women's Bantamweight2026-05-01: #3, Women's Bantamweight2026-05-08: #3, Women's Bantamweight2026-05-15: #3, Women's Bantamweight2026-05-29: #3, Women's Bantamweight2026-06-05: #3, Women's Bantamweight2026-06-13: #3, Women's Bantamweight2026-06-19: #3, Women's Bantamweight2026-06-26: #3, Women's Bantamweight2026-07-10: #3, Women's Bantamweight2026-07-17: #3, Women's Bantamweight2026-07-24: #3, Women's Bantamweight2026-07-31: #3, Women's Bantamweight2026-08-07: #3, Women's Bantamweight2026-08-14: #3, Women's Bantamweight2026-08-21: #3, Women's Bantamweight2026-08-28: #5, Women's Bantamweight2026-09-04: #6, Women's Bantamweight2026-09-11: #7, Women's Bantamweight2026-09-18: #8, Women's Bantamweight2026-09-25: #8, Women's Bantamweight2026-09-26: #8, Women's Bantamweight2026-10-03: #9, Women's Bantamweight2026-10-10: #9, Women's Bantamweight2026-10-17: #9, Women's Bantamweight2026-10-24: #9, Women's Bantamweight2026-10-31: #8, Women's Bantamweight#8

Position on the registered v1.0 board at each weekly snapshot (C = title holder or reserved, drawn at the top; lower is better). Absent from 31 of 132 snapshots (gaps in the line).

Predictive rating by bout

1,5501,6001,6501,70020162018202020222024Nov 2013Oct 20262013-11-30: 1,594 (W vs Jessica Rakoczy)2015-04-04: 1,656 (W vs Milana Dudieva)2015-10-03: 1,654 (W vs Jessica Eye)2016-07-09: 1,634 (W vs Cat Zingano)2017-01-28: 1,630 (L vs Valentina Shevchenko)2019-07-13: 1,586 (W vs Nicco Montano)2020-10-03: 1,585 (L vs Germaine de Randamie)2021-01-23: 1,601 (W vs Sara McMann)2021-12-11: 1,695 (W vs Amanda Nunes)2022-07-30: 1,674 (L vs Amanda Nunes)2024-10-05: 1,639 (W vs Raquel Pennington)2025-06-07: 1,600 (L vs Kayla Harrison)1,600

Rating after each UFC bout from the frozen predictive model (performance-adjusted Elo, data/processed/elo_history.csv; a debut starts at 1,500). The resume rating's history is not stored, so this is the predictive line, which is a different number from the resume rating in the header.

Trajectory

Recent performances run about 85 points behind the rating: fighters this age typically run 59 points behind their rating, and her own recent results put her a further 25 points behind.

ComponentPointsMeaning
Age component-59what fighters aged 37.2 typically run relative to their rating (population curve, all UFC bouts since 2011)
Own recent results-25her recency-weighted mean and trend over 12 bouts, shrunk toward zero; trend -4 points a year
Combined-85the rating's likely distance from her current performance level, in rating points
Readingbehind ratingahead of, in line with (within 30 points), or behind the rating

Performance relative to the rating, by age

-1.0-0.5+0.0+0.5+1.024262830323436382013-11-30 (age 24.3): W vs Jessica Rakoczy, residual +0.472015-04-04 (age 25.6): W vs Milana Dudieva, residual +0.412015-10-03 (age 26.1): W vs Jessica Eye, residual +0.152016-07-09 (age 26.9): W vs Cat Zingano, residual +0.032017-01-28 (age 27.4): L vs Valentina Shevchenko, residual -0.512019-07-13 (age 29.9): W vs Nicco Montano, residual -0.012020-10-03 (age 31.1): L vs Germaine de Randamie, residual -0.462021-01-23 (age 31.4): W vs Sara McMann, residual +0.392021-12-11 (age 32.3): W vs Amanda Nunes, residual +0.762022-07-30 (age 32.9): L vs Amanda Nunes, residual -0.282024-10-05 (age 35.1): W vs Raquel Pennington, residual +0.082025-06-07 (age 35.8): L vs Kayla Harrison, residual -0.61-0.12

Each dot is one decided UFC bout at her age then: the performance score minus the rating's expectation, on the score's own scale from -1 to +1 (filled = win, hollow = loss; above zero is better than the rating implied; a finish as a slight favourite is about +0.45). The dashed line is the population curve for all fighters; the solid line is this fighter's own fitted level and trend as of the data date, weighted toward recent bouts. One unit sustained over many bouts corresponds to about 695 rating points; a single bout's residual is noisy.

Held-out evidence (walk-forward 2016 to 2026, EXP-2026-10-21-01): the age curve held in every test year; the individual component is a weak signal (correlation 0.06 with the next bout's residual; among fighters aged 33 or over, the lowest predicted quartile won 38% of next bouts against 53% expected, the highest 48% against 52%) and adds nothing to bout prediction beyond the shadow model. No board uses any of it: the rankings answer who has earned the place, not who wins next (EXP-2026-10-20-09). Method: src/mmalab/decline.py; settings: config/decline.yaml (expectation from the resume rating; one unit of residual is about 695 rating points).

Context flags

Descriptive only. Each line is a population fact about fighters like her, not a forecast for her; the register entries hold the measurements.

REAL v1.0 (registered method) · build c166ee8 · data through 2026-10-31 · page built 2026-11-06 · changelog. Independent fan research project built on public UFCStats data. Not affiliated with, sponsored or endorsed by UFC, Zuffa, LLC, TKO Group Holdings, or any athlete. All trademarks belong to their owners and are used only to identify athletes and events.