Seokhyeon Ko

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 27-28: the 10th to 90th percentile of his position across weight vectors drawn near the 70/30 weights. Rating 1,583, deviation 203: measured from 3 UFC bouts; a one-bout newcomer sits near 290. Provisional: 3 UFC bouts; the rating rests on little evidence.

Age 33 (born 1993-09-24) · Height 5 ft 10 in (178 cm) · Reach 71 in (180 cm) · Stance Southpaw · 106 days since last bout (2026-07-18) · Last five 2-1 · Streak L1

Why he is ranked here

Rating 1,583 is the division's 30th highest of 76 board fighters; the ledger stands at -1.0 (less 1.0 for other losses outside the top 5; losses count for three years); 0 quality wins in 15 years, 0 over top-10 opponents; no form penalty (2-1 last five). Score +0.08 = +0.08 (rating term, 70% weight) +0.00 (ledger term, 30% weight) -0.00 (form penalty); score order put him at #28.

Term	Value	Detail
Score	+0.08	70% rating term + 30% ledger term - form penalty
Rating term	+0.08	resume rating 1,583, scaled against the division's interdecile range
Ledger term	+0.00	quality ledger -1.0: +0.0 QW +0.0 proof -0.0 blowout -1.0 weak
Form penalty	0.00	last five 2-1
Quality wins, 15 years	0	0 over top-10 opponents, 0 over top-15
Placement	score order #28	v1.0 (registered)
Shadow board v1.1	#33	score -0.02; score order #33

All 3 UFC bouts

Date	Event	Opponent	Opp. official rank	Result	Method	Round	Model p
2026-07-18	UFC Fight Night: Du Plessis vs. Usman	Jean-Paul Lebosnoyani	unranked	L	unanimous decision	3 (5:00)	67%
2025-11-01	UFC Fight Night: Garcia vs. Onama	Phil Rowe	unranked	W	unanimous decision	3 (5:00)	59%
2025-06-21	UFC Fight Night: Hill vs. Rountree Jr.	Oban Elliott	unranked	W	unanimous decision	3 (5:00)	30%

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 76 board fighters at Welterweight at or below this value; high is a position in the division, not a verdict.

Output
Significant strikes landed per minute	3.00	(26th percentile at Welterweight)
Significant strike accuracy	50%	(57th percentile at Welterweight)
Knockdowns scored per 15 minutes	0.00	(32nd percentile at Welterweight)
Share of wins by finish	0%	(10th percentile at Welterweight)
Defence and damage
Significant strikes absorbed per minute	1.47	(8th percentile at Welterweight)
Significant strike defence	65%	(96th percentile at Welterweight)
Knockdowns suffered per 15 minutes	0.00	(42nd percentile at Welterweight)
Significant strikes absorbed, career	66	(25th percentile at Welterweight)
KO/TKO losses	0	(37th percentile at Welterweight)
Submission losses	0	(66th percentile at Welterweight)
KO/TKO losses per bout over 10 years, each weighted down by the finisher's danger	0.000	(39th percentile at Welterweight)
Grappling
Takedowns landed per 15 minutes	3.33	(87th percentile at Welterweight)
Takedown defence	50%	(24th percentile at Welterweight)
Share of cage time in control	56%	(96th percentile at Welterweight)
Share of significant strikes landed in the clinch or on the ground	36%	(77th percentile at Welterweight)
Style	wrestler (5.7 takedown attempts per 15 min; 56% control)
Career stage
Age	33.1	(53rd percentile at Welterweight)
Age at UFC debut	31.7	(84th percentile at Welterweight)
Years since UFC debut	1.4	(30th percentile at Welterweight)
UFC bouts	3	(34th percentile at Welterweight)
Cage time, minutes	45	(45th percentile at Welterweight)
Bouts per year, last three years	2.2	(83rd percentile at Welterweight)
Days since last bout	106	(54th percentile at Welterweight)

Board position since Oct 2023

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 72 of 132 snapshots (gaps in the line).

Predictive rating by bout

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

Component	Points	Meaning
Age component	-23	what fighters aged 33.1 typically run relative to their rating (population curve, all UFC bouts since 2011)
Own recent results	+15	his recency-weighted mean and trend over 3 bouts, shrunk toward zero; trend -1 points a year
Combined	-8	the rating's likely distance from his current performance level, in rating points
Reading	in line with rating	ahead of, in line with (within 30 points), or behind the rating

Performance relative to the rating, by age

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.