Back to the boards · All fighter profiles

Billy Quarantillo

Featherweight · REAL v1.0 (registered) #89; v1.1 (shadow) #85

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 88-89: the 10th to 90th percentile of his position across weight vectors drawn near the 70/30 weights. Rating 1,515, deviation 127: measured from 12 UFC bouts; a one-bout newcomer sits near 290.

Age 37 (born 1988-12-08) · Height 5 ft 10 in (178 cm) · Reach 70 in (178 cm) · Stance Orthodox · 85 days since last bout (2026-08-08) · Last five 1-4 · Streak L3

Why he is ranked here

Rating 1,515 is the division's 55th highest of 94 board fighters; the ledger stands at -3.0 (less 1.0 for blowout losses, less 2.0 for other losses outside the top 5; losses count for three years); 0 quality wins in 15 years, 0 over top-10 opponents; form penalty 0.60 for a 1-4 last five. Score -0.80 = -0.04 (rating term, 70% weight) -0.15 (ledger term, 30% weight) -0.60 (form penalty); score order put him at #89.

TermValueDetail
Score-0.8070% rating term + 30% ledger term - form penalty
Rating term-0.04resume rating 1,515, scaled against the division's interdecile range
Ledger term-0.15quality ledger -3.0: +0.0 QW +0.0 proof -1.0 blowout -2.0 weak
Form penalty0.60last five 1-4
Quality wins, 15 years00 over top-10 opponents, 0 over top-15
Placementscore order #89v1.0 (registered)
Shadow board v1.1#85score -0.78; score order #85

Rules, weights and worked examples: methodology.

Last ten bouts

DateEventOpponentOpp. official rankResultMethodRoundModel p
2026-08-08UFC Fight Night: Gamrot vs. SalkilldDiego FerreiraunrankedLunanimous decision3 (5:00)37%
2024-12-14UFC Fight Night: Covington vs. BuckleyCub SwansonunrankedLKO/TKO3 (1:36)46%
2024-03-23UFC Fight Night: Ribas vs. NamajunasYoussef ZalalunrankedLsubmission2 (1:50)67%
2023-08-05UFC Fight Night: Sandhagen vs. FontDamon JacksonunrankedWunanimous decision3 (5:00)50%
2023-04-15UFC Fight Night: Holloway vs. AllenEdson Barboza#14LKO/TKO1 (2:37)60%
2022-12-10UFC 282: Blachowicz vs. AnkalaevAlexander HernandezunrankedWKO/TKO2 (4:30)45%
2021-11-06UFC 268: Usman vs. Covington 2Shane Burgos#14Lunanimous decision3 (5:00)59%
2021-07-17UFC Fight Night: Makhachev vs. MoisesGabriel BenitezunrankedWKO/TKO3 (3:40)46%
2020-12-12UFC 256: Figueiredo vs. MorenoGavin TuckerunrankedLunanimous decision3 (5:00)58%
2020-09-12UFC Fight Night: Waterson vs. HillKyle NelsonunrankedWKO/TKO3 (0:07)68%

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 him (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 94 board fighters at Featherweight at or below this value; high is a position in the division, not a verdict.

Output
Significant strikes landed per minute6.80(93rd percentile at Featherweight)
Significant strike accuracy50%(66th percentile at Featherweight)
Knockdowns scored per 15 minutes0.22(46th percentile at Featherweight)
Share of wins by finish67%(62nd percentile at Featherweight)
Defence and damage
Significant strikes absorbed per minute6.07(82nd percentile at Featherweight)
Significant strike defence44%(16th percentile at Featherweight)
Knockdowns suffered per 15 minutes0.33(57th percentile at Featherweight)
Significant strikes absorbed, career836(93rd percentile at Featherweight)
KO/TKO losses2 (last 2024-12-14, 687 days ago)(96th percentile at Featherweight)
Submission losses1(94th percentile at Featherweight)
KO/TKO losses per bout over 10 years, each weighted down by the finisher's danger0.106(69th percentile at Featherweight)
Grappling
Takedowns landed per 15 minutes1.53(60th percentile at Featherweight)
Takedown defence60%(45th percentile at Featherweight)
Share of cage time in control25%(78th percentile at Featherweight)
Share of significant strikes landed in the clinch or on the ground32%(82nd percentile at Featherweight)
Stylewrestler (5.9 takedown attempts per 15 min; 25% control)
Career stage
Age37.9(91st percentile at Featherweight)
Age at UFC debut31.0(82nd percentile at Featherweight)
Years since UFC debut6.9(83rd percentile at Featherweight)
UFC bouts12(86th percentile at Featherweight)
Cage time, minutes138(84th percentile at Featherweight)
Bouts per year, last three years1.0(31st percentile at Featherweight)
Days since last bout85(43rd percentile at Featherweight)

Board position since Oct 2023

C2040608010020252026Oct 2023Oct 20262023-10-06: #34, Featherweight2023-10-13: #33, Featherweight2023-10-20: #33, Featherweight2023-11-03: #34, Featherweight2023-11-10: #34, Featherweight2023-11-17: #32, Featherweight2023-12-01: #34, Featherweight2023-12-08: #34, Featherweight2023-12-15: #25, Featherweight2024-01-12: #24, Featherweight2024-01-19: #24, Featherweight2024-02-02: #24, Featherweight2024-02-09: #24, Featherweight2024-02-16: #24, Featherweight2024-02-23: #24, Featherweight2024-03-01: #25, Featherweight2024-03-08: #25, Featherweight2024-03-15: #25, Featherweight2024-03-22: #25, Featherweight2024-03-29: #56, Featherweight2024-04-05: #53, Featherweight2024-04-12: #54, Featherweight2024-04-26: #55, Featherweight2024-05-03: #55, Featherweight2024-05-10: #56, Featherweight2024-05-17: #54, Featherweight2024-05-31: #54, Featherweight2024-06-07: #53, Featherweight2024-06-14: #53, Featherweight2024-06-21: #53, Featherweight2024-06-28: #54, Featherweight2024-07-12: #54, Featherweight2024-07-19: #55, Featherweight2024-07-26: #56, Featherweight2024-08-02: #56, Featherweight2024-08-09: #56, Featherweight2024-08-16: #53, Featherweight2024-08-23: #52, Featherweight2024-09-06: #55, Featherweight2024-09-13: #57, Featherweight2024-09-27: #55, Featherweight2024-10-04: #54, Featherweight2024-10-11: #54, Featherweight2024-10-18: #53, Featherweight2024-10-25: #52, Featherweight2024-11-01: #51, Featherweight2024-11-08: #46, Featherweight2024-11-15: #46, Featherweight2024-11-22: #46, Featherweight2024-12-06: #46, Featherweight2024-12-13: #47, Featherweight2025-01-10: #66, Featherweight2025-01-17: #65, Featherweight2025-01-31: #63, Featherweight2025-02-07: #64, Featherweight2025-02-14: #65, Featherweight2025-02-21: #65, Featherweight2025-02-28: #65, Featherweight2025-03-07: #63, Featherweight2025-03-14: #62, Featherweight2025-03-21: #62, Featherweight2025-03-28: #62, Featherweight2025-04-04: #62, Featherweight2025-04-11: #63, Featherweight2025-04-25: #64, Featherweight2025-05-02: #63, Featherweight2025-05-09: #62, Featherweight2025-05-16: #62, Featherweight2025-05-30: #63, Featherweight2025-06-06: #63, Featherweight2025-06-13: #63, Featherweight2025-06-20: #63, Featherweight2025-06-27: #63, Featherweight2025-07-11: #62, Featherweight2025-07-18: #62, Featherweight2025-07-25: #62, Featherweight2025-08-01: #62, Featherweight2025-08-08: #62, Featherweight2025-08-15: #63, Featherweight2025-08-22: #64, Featherweight2025-09-05: #65, Featherweight2025-09-12: #66, Featherweight2025-09-26: #65, Featherweight2025-10-03: #65, Featherweight2025-10-10: #64, Featherweight2025-10-17: #66, Featherweight2025-10-24: #65, Featherweight2025-10-31: #66, Featherweight2025-11-07: #65, Featherweight2025-11-14: #64, Featherweight2025-11-21: #65, Featherweight2025-12-05: #66, Featherweight2025-12-12: #65, Featherweight2026-01-23: #63, Featherweight2026-01-30: #64, Featherweight2026-02-06: #67, Featherweight2026-02-20: #68, Featherweight2026-02-27: #68, Featherweight2026-03-06: #71, Featherweight2026-03-13: #71, Featherweight2026-03-20: #70, Featherweight2026-03-27: #72, Featherweight2026-04-03: #73, Featherweight2026-04-10: #73, Featherweight2026-04-17: #71, Featherweight2026-04-24: #71, Featherweight2026-05-01: #70, Featherweight2026-05-08: #72, Featherweight2026-05-15: #72, Featherweight2026-05-29: #71, Featherweight2026-06-05: #74, Featherweight2026-08-14: #89, Featherweight2026-08-21: #89, Featherweight2026-08-28: #90, Featherweight2026-09-04: #90, Featherweight2026-09-11: #91, Featherweight2026-09-18: #93, Featherweight2026-09-25: #92, Featherweight2026-09-26: #91, Featherweight2026-10-03: #92, Featherweight2026-10-10: #91, Featherweight2026-10-17: #90, Featherweight2026-10-24: #90, Featherweight2026-10-31: #89, Featherweight#89

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 8 of 132 snapshots (gaps in the line).

Predictive rating by bout

1,5001,5501,6001,6501,70020212022202320242025Dec 2019Oct 20262019-12-07: 1,597 (W vs Jacob Kilburn)2020-05-30: 1,621 (W vs Spike Carlyle)2020-09-12: 1,656 (W vs Kyle Nelson)2020-12-12: 1,579 (L vs Gavin Tucker)2021-07-17: 1,664 (W vs Gabriel Benitez)2021-11-06: 1,620 (L vs Shane Burgos)2022-12-10: 1,672 (W vs Alexander Hernandez)2023-04-15: 1,620 (L vs Edson Barboza)2023-08-05: 1,650 (W vs Damon Jackson)2024-03-23: 1,572 (L vs Youssef Zalal)2024-12-14: 1,572 (L vs Cub Swanson)2026-08-08: 1,530 (L vs Diego Ferreira)1,530

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 108 points behind the rating: fighters this age typically run 76 points behind their rating, and his own recent results put him a further 32 points behind.

ComponentPointsMeaning
Age component-76what fighters aged 37.9 typically run relative to their rating (population curve, all UFC bouts since 2011)
Own recent results-32his recency-weighted mean and trend over 12 bouts, shrunk toward zero; trend -7 points a year
Combined-108the rating's likely distance from his 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+1.0303132333435363738392019-12-07 (age 31.0): W vs Jacob Kilburn, residual +0.472020-05-30 (age 31.5): W vs Spike Carlyle, residual +0.062020-09-12 (age 31.8): W vs Kyle Nelson, residual +0.342020-12-12 (age 32.0): L vs Gavin Tucker, residual -0.392021-07-17 (age 32.6): W vs Gabriel Benitez, residual +0.592021-11-06 (age 32.9): L vs Shane Burgos, residual -0.162022-12-10 (age 34.0): W vs Alexander Hernandez, residual +0.412023-04-15 (age 34.3): L vs Edson Barboza, residual -0.492023-08-05 (age 34.7): W vs Damon Jackson, residual +0.072024-03-23 (age 35.3): L vs Youssef Zalal, residual -0.632024-12-14 (age 36.0): L vs Cub Swanson, residual -0.422026-08-08 (age 37.7): L vs Diego Ferreira, residual -0.30-0.16

Each dot is one decided UFC bout at his 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 him, not a forecast for him; 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.