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YiSak Lee

Middleweight · REAL v1.0 (registered) #51; v1.1 (shadow) #46

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 48-55: the 10th to 90th percentile of his position across weight vectors drawn near the 70/30 weights. Rating 1,455, deviation 291: measured from 1 UFC bout; a one-bout newcomer sits near 290. Provisional: 1 UFC bout; the rating rests on little evidence.

Age unknown · Height unknown · Reach unknown · Stance unknown · 155 days since last bout (2026-05-30) · Last five 0-1 · Streak L1

Why he is ranked here

Rating 1,455 is the division's 68th highest of 79 board fighters; the ledger stands at -1.0 (less 1.0 for blowout losses; losses count for three years); 0 quality wins in 15 years, 0 over top-10 opponents; no form penalty (0-1 last five). Score -0.24 = -0.24 (rating term, 70% weight) +0.00 (ledger term, 30% weight) -0.00 (form penalty); score order put him at #51.

TermValueDetail
Score-0.2470% rating term + 30% ledger term - form penalty
Rating term-0.24resume rating 1,455, scaled against the division's interdecile range
Ledger term+0.00quality ledger -1.0: +0.0 QW +0.0 proof -1.0 blowout -0.0 weak
Form penalty0.00last five 0-1
Quality wins, 15 years00 over top-10 opponents, 0 over top-15
Placementscore order #51v1.0 (registered)
Shadow board v1.1#46score -0.35; score order #46

Rules, weights and worked examples: methodology.

All 1 UFC bout

DateEventOpponentOpp. official rankResultMethodRoundModel p
2026-05-30UFC Fight Night: Song vs. FigueiredoLuis Felipe DiasunrankedLKO/TKO1 (3:40)50%

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

Output
Significant strikes landed per minute2.73(24th percentile at Middleweight)
Significant strike accuracy40%(8th percentile at Middleweight)
Knockdowns scored per 15 minutes0.00(30th percentile at Middleweight)
Share of wins by finishn/a
Defence and damage
Significant strikes absorbed per minute5.73(92nd percentile at Middleweight)
Significant strike defence48%(28th percentile at Middleweight)
Knockdowns suffered per 15 minutes4.09(96th percentile at Middleweight)
Significant strikes absorbed, career21(11th percentile at Middleweight)
KO/TKO losses1 (last 2026-05-30, 155 days ago)(65th percentile at Middleweight)
Submission losses0(59th percentile at Middleweight)
KO/TKO losses per bout over 10 years, each weighted down by the finisher's danger0.425(99th percentile at Middleweight)
Grappling
Takedowns landed per 15 minutes0.00(16th percentile at Middleweight)
Takedown defencen/a
Share of cage time in control0%(4th percentile at Middleweight)
Share of significant strikes landed in the clinch or on the ground0%(5th percentile at Middleweight)
Stylestriker (0.0 takedown attempts per 15 min; 0% control)
Career stage
Agen/a
Age at UFC debutn/a
Years since UFC debut0.4(9th percentile at Middleweight)
UFC bouts1(11th percentile at Middleweight)
Cage time, minutes4(5th percentile at Middleweight)
Bouts per year, last three years1.0(18th percentile at Middleweight)
Days since last bout155(70th percentile at Middleweight)

Board position since Oct 2023

C20406020252026Oct 2023Oct 20262026-06-05: #55, Middleweight2026-06-13: #55, Middleweight2026-06-19: #55, Middleweight2026-06-26: #55, Middleweight2026-07-10: #52, Middleweight2026-07-17: #49, Middleweight2026-07-24: #48, Middleweight2026-07-31: #48, Middleweight2026-08-07: #49, Middleweight2026-08-14: #49, Middleweight2026-08-21: #50, Middleweight2026-08-28: #50, Middleweight2026-09-04: #51, Middleweight2026-09-11: #53, Middleweight2026-09-18: #53, Middleweight2026-09-25: #52, Middleweight2026-09-26: #51, Middleweight2026-10-03: #51, Middleweight2026-10-10: #50, Middleweight2026-10-17: #49, Middleweight2026-10-24: #50, Middleweight2026-10-31: #51, Middleweight#51

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 110 of 132 snapshots (gaps in the line).

Predictive rating by bout

1,4001,450May 2026Oct 20262026-05-30: 1,420 (L vs Luis Felipe Dias)1,420

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

No trajectory index: it needs three decided UFC bouts and a bout within the last three years (config/decline.yaml).

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.