A finisher's lean over a 1-2 roster record — with a knockout loss on top of the file
Fight overview
First-round chaos and finishing equity versus lower absorption and a younger chin question. Erosa 57 / Lee 43 — conviction capped because the favorite was knocked out in March.
Editorial assessment of the evidence, not a win probability or a calibrated confidence interval.
Quotes older than 48 hours are marked outdated. EV at an old or undated price is a historical calculation, not a current opportunity. Date-only snapshots have no verified capture time.
Rate lines were compiled September 22, 2026. Erosa record 31-14-0 (announced sheet had 31-13). Lee roster bout count is 3; Road to UFC bouts sit inside the compiled rate line. Per-round tables omitted. No BetOnline price.
Model methodologyWhat this fight is really about — and the measurements that shape it
Three-round featherweight preliminary bout in the 25-foot APEX cage. Julian "Juicy J" Erosa is 31-14 after a Round-1 knockout loss to Lerryan Douglas on March 28, 2026. The announced sheet said 31-13; this page uses 31-14, card rank #20, age 37. His compiled rate line is 6.18 SLpM, 48% accuracy, 48% striking defence, 6.31 SApM, 1.73 TD/15, 43% takedown accuracy, 61% takedown defence and 0.7 Sub/15. JeongYeong "Korean Tiger" Lee is 11-3, card rank #65, age 30. His recent ledger includes a decision loss to Daniel Santos and a stoppage by Hyder Amil. His compiled rate line is 3.38 SLpM, 49% accuracy, 50% striking defence, 3.82 SApM, 0.63 TD/15, 66% takedown accuracy and 72% takedown defence, on three UFC roster bouts. No BetOnline price was posted. We take Erosa 57% / Lee 43% at conviction 4 / 10.
Erosa is the bigger featherweight by a small reach. +3" in height, +1" in reach (74" to 73"), +1.5" in leg reach. Erosa is southpaw; Lee is orthodox. Lee is seven years younger. Erosa has 18 UFC bouts in the sample; Lee has 3 roster bouts. The pair is medium reliability.
Venue FactorA 25-foot cage compresses a three-inch height edge. Erosa's fights are already short on average (7:45). Lee's are too (7:54). Both lose and win inside the first round on the recent log.
Careers, chins, schedules — and the form they bring into the cage
Erosa finishes almost everyone he beats and gets finished often himself. Recent window: Elkins by strikes, Rodriguez and Ramos by guillotine. He is a first-round fighter in both directions. Position split 78% standing, 16% clinch, 6% ground — submissions arrive out of scrambles more than out of a top-control diet.
Three career submissions are all armbars on the compiled ledger. His UFC striking rate does not show a grappling identity: 0.63 TD/15 and 0.3 Sub/15. He absorbs less than Erosa (3.82 vs 6.31) and lands far less (3.38 vs 6.18). 72% takedown defence is the best defensive number on his sheet.
Opponent context: prospect
Opponent context: veteran
Opponent context: veteran
Opponent context: prospect
Opponent context: veteran
3-2, and four of the five ended in round one. The Costa loss is the only distance fight in the five. Current form is two straight losses, the last one a knockout.
Opponent context: prospect
Opponent context: prospect
Opponent context: prospect
Lee does not have five roster bouts. The three above are the UFC roster log: 1-2, with the win a decision and the losses a decision and a first-round knockout.
Critical InsightCareer win charts: Erosa 12 KO + 14 Sub + 5 Dec = 31; Lee 4 KO + 3 Sub + 4 Dec = 11. Erosa does not grind scorecards — five decision wins in 31. Round bars for finishes beyond the recent UFC window are incomplete; DEC counts are career decision wins.
Without a reliable shared-opponent table, compare who each fighter has been tested against using SOS tier, UFC sample size, and recent elite-tier form — not raw records alone.
| Factor | Julian | Jeong |
|---|---|---|
| Strength of schedule (SOS tier) | Deep — Recent wins Elkins, Rodriguez, Ramos; losses Douglas, Costa, plus a long KO-loss column | Thin UFC sample — Roster: loss Santos, loss Amil, win Bilder by decision |
| UFC sample | 18 UFC bouts in the sample file | 3 roster bouts (1-2) |
| Recent ranked / elite touches (last 5) | 0 elite · 3 veteran tier | 0 elite · 0 veteran tier |
| Form-window difficulty edge: Fighter A (8 vs 3 tier points in listed bouts). | ||
| Last three opponents | Lerryan Douglas, Melquizael Costa, Darren Elkins | Daniel Santos, Hyder Amil, Blake Bilder |
Composites, division ranks and round-by-round evidence
Composite scores summarize selected statistics on a 0–100 scale. They are not win probabilities. Compare the underlying metrics, opponent quality and sample flags before interpreting a score difference as a matchup advantage.
Editorial reading of the compiled rate lines
Erosa 6.18 / 48% / 48% def / 6.31 absorbed. Lee 3.38 / 49% / 50% def / 3.82 absorbed.
Editorial reading of the compiled rate lines
Erosa 0.7 Sub/15, 43% TD accuracy and 14 career subs. Lee 0.3 Sub/15, 66% TD accuracy, 72% TDD.
(Striking + Grappling) / 2
Technical lean to Erosa on finishing toolkit and sample.
Editorial durability gauge
Erosa's knockout losses are a long list. Lee's Amil loss is one, and his absorption is lower.
Editorial overall
Finishing equity and sample, minus the chin. Overall gap is small on purpose.
| Metric | Julian | Jeong |
|---|---|---|
| Striking accuracy | 48% (909/1,881) | 49% (160/324) |
| Standing / clinch / ground | 78% / 16% / 6% | 70% / 18% / 12% |
| Average fight time | 7:45 | 7:54 |
| Prior UFC bouts | 18 | 3 |
| Card rank | #20 | #65 |
No archetype base-rate row — editorial 57/43 · The lean is experience and a finishing toolkit, not a statement that Erosa is hard to hit. 6.31 SApM and 48% striking defence say so.
| Stat | Julian | Julian rank | Div avg | Jeong rank | Jeong |
|---|---|---|---|---|---|
| SLpMSLpMSignificant Strikes Landed per Minute — offensive striking volume. Higher = busier striker. | 6.18 | — | — | — | 3.38 |
| Str AccStr AccStriking Accuracy — share of significant strikes thrown that land. Higher = more precise. | 48% | — | — | — | 49% |
| Str DefStr DefStriking Defense — share of opponents' significant strikes that do NOT land. Higher = harder to hit. | 48% | — | — | — | 50% |
| SApMSApMSignificant Strikes Absorbed per Minute — how much a fighter gets hit. Lower = better. | 6.31 | — | — | — | 3.82 |
| TD/15TD/15Takedowns Landed per 15 minutes — wrestling pressure / takedown engine. | 1.73 | — | — | — | 0.63 |
| TD Acc | 43% | — | — | — | 66% |
| TD DefTD DefTakedown Defense — share of opponents' takedown attempts stuffed. | 61% | — | — | — | 72% |
| Sub/15Sub/15Submission Attempts per 15 minutes — how actively a fighter hunts the finish on the mat. | 0.7 | — | — | — | 0.3 |
| KD/15 | 0.20 | — | — | — | 0.32 |
| Prior UFC bouts | 18 | — | — | — | 3 |
Statistical VerdictErosa throws a fight. Lee throws a careful one and still just lost two. Defence percentages are almost the same. The absorption gap is the tax Erosa pays for 6.18 per minute. The submission gap is why he is still the lean.
Round-by-round significant-strike figures are unavailable for this comparison. Missing observations are not zero strikes.
Round-by-round control-time figures are unavailable for this comparison. Missing observations are not zero seconds of control.
Critical InsightIf the fight becomes a scramble in round one, the log favors Erosa. If it becomes a careful fifteen minutes, Lee's lower absorption is the argument — and he just lost that kind of fight to Santos.
Strike-target figures are unavailable for this comparison.
Head hunting vs body work vs leg attack — the shape of the damage. Unavailable strike-target figures are omitted rather than shown as 0%.
The distribution of strikes by range is unavailable for this comparison.
Approximate share of significant strikes by range in available rounds, weighted by strike volume. Incomplete splits are excluded. Debutants / fighters without Octagon samples show as N/A.
Advantages, worst cases, gameplans — and the patterns underneath
6.18 SLpM against 3.38 — volume if it stays standing
Erosa's chin vs Lee's lower absorption — both can be sparked
Scramble entries into guillotines
0.7 Sub/15 and 14 career subs against 0.3 Sub/15
Erosa is the more dangerous finisher and the more knockable man. Lee is younger, ranked much lower, and has lost two in a row, one of them in 65 seconds. The lean is experience and a finishing toolkit, not a statement that Erosa is hard to hit.
A 57% favorite who was knocked out in his last fight does not get a conviction above 4.
Force a first-round scramble. Guillotine or strikes — the Rodriguez/Ramos/Elkins window — before a younger man can make it a clean kickboxing round.
14 submission wins and 0.7 Sub/15.
6.18 SLpM against 3.38.
+3" height.
18 UFC bouts against 3.
Still showed up against Elkins, Rodriguez and Ramos.
Look for the neck on level changes — average fight under eight minutes for a reason.
The open is where his wins live.
Survive round one, use 72% takedown defence and the lower absorption, and steal a decision the way Santos just did to him — which means he has to be better than he was in that fight.
30 versus 37.
3.82 SApM against 6.31.
72% TDDef.
Knocked out in March and lost a decision the fight before.
Only 0.20 KD/15 — finishes are chaotic, not a sniper's.
Don't blitz into a guillotine; make Erosa lead and miss.
The Santos loss says a patient fight can go against him too.
Lee finds the chin that Douglas found — 16% KO path is real.
A careful fifteen minutes that looks like the Santos loss for Lee goes the other way on absorption.
An armbar scramble if Erosa shoots careless.
First-round guillotine or strikes end it before he settles.
He has already been finished in a minute in the UFC.
Erosa's 18-bout sample and finishing habit simply overwhelm a 1-2 roster record.
Four of Erosa's last five ended in round one. Lee's Amil loss was 1:05 of round one. Inside-the-distance share is 71%.
Erosa's loss column is full of knockouts. Lee has one UFC knockout loss and a lower absorption rate.
Three career armbars have not become a UFC submission rate — 0.3 Sub/15.
Erosa finish threat 28%; Lee 16%. Douglas, Elkins, Rodriguez, Ramos and Amil all live here.
Critical InsightThe fight is front-loaded. Survive the open and Lee's absorption case grows. Fail the open and Erosa's submission or strike buckets cash.
Share of each fighter's wins that end in each round — early finishers spike left, grinders rise right.
One hundred simulated fights, the betting market, and our conviction
Erosa 57% / Lee 43%, conviction 4/10 — finishing toolkit over a 1-2 roster record, capped by the March knockout loss.
Inside the distance 71%. Erosa submission 24% is the largest bucket; Lee KO 16% is the live hedge.
Announced card ranks #20 and #65. Record used: Erosa 31-14. No BetOnline price.
Each square represents one percentage point of the model distribution, not an observed fight. This visualization does not measure model accuracy or reduce uncertainty in the inputs.
Each square = 1 simulated fight. Julian Erosa gold · Jeong Yeong Lee orange · full color = decision, 70% = submission, 45% = KO/TKO.
Erosa 24% submission is the largest bucket — guillotine, not lay-and-pray.
Lee 16% KO is real because Erosa's chin is real.
18 UFC bouts against 3 roster bouts.
Only 29% go the distance — five career decision wins for Erosa.
No BetOnline on the September 22, 2026 board.
First-round scramble, neck found — Rodriguez/Ramos shape.
Scripted outcomes for Julian Erosa vs Jeong Yeong Lee — how each version of this fight unfolds.
The other first-round branch — and the one that exposes him.
Only five career decision wins. Unlikely identity.
Largest bucket. Guillotine, not a lay-and-pray.
Real because Erosa's chin is real.
The path if he survives the open.
Three career armbars, 0.3 per 15 on the compiled rate line.
EV uses the displayed price: probability × decimal odds − 1. Edge is a percentage-point difference from a proportionally de-vigged, same-book pair. A dash means that comparison is unavailable.
Quotes older than 48 hours are marked outdated. EV at an old or undated price is a historical calculation, not a current opportunity. Date-only snapshots have no verified capture time.
Fair odds are the break-even price under this estimate, not a recommended entry price. Model uncertainty can erase a small edge.
Change the assumptions to see how the required price moves. This does not update the published model or recommend an entry price.
Required decimal price: 1.76 or higher. At the exact unrounded break-even price, estimated EV is zero.
Change the assumptions to see how the required price moves. This does not update the published model or recommend an entry price.
Required decimal price: 2.33 or higher. At the exact unrounded break-even price, estimated EV is zero.
Analyst prop read
No prop carries a clear value lean in this analysis.
Green rows mark props where our analysis sees value at the recorded BetOnline price. Red rows are overpriced relative to the model share. These are snapshots — verify the line is still available before acting.
| Prop | Reference quote | Implied % | Model % | Fair decimal odds | Difference (pp) | Estimated EV | Our read |
|---|---|---|---|---|---|---|---|
| Erosa by KO/TKO | +355 | 22.0% | 22% | 4.55 | +0.0 | +0.1% | Fair price |
| Erosa by submission | +317 | 24.0% | 24% | 4.17 | +0.0 | +0.1% | Fair price |
| Fight goes the distance | +245 | 29.0% | 29% | 3.45 | +0.0 | +0.1% | Fair price |
| Lee by decision | +456 | 18.0% | 18% | 5.56 | +0.0 | +0.1% | Fair price |
| Lee by KO/TKO | +525 | 16.0% | 16% | 6.25 | 0.0 | 0.0% | Fair price |
| Fight does not go the distance | -245 | 71.0% | 71% | 1.41 | -0.0 | -0.0% | Fair price |
Prop differences use raw implied probability, including the bookmaker margin. They are not the no-vig moneyline edge above.
These notes describe the original analysis and may refer to older prices.
Best lean: Erosa by submission at 24%. Lee by KO/TKO at 16% is the live hedge, because the favorite was knocked out in his last fight. No market line on this file.
Editorial confidence in the evidence, not a win probability or a calibrated confidence interval.
A finisher's lean over a 1-2 roster record, with the favorite's last fight a knockout loss sitting on top of the file. Lean: Julian Erosa.
Fourteen career submissions and a 0.7 per-15 rate
Twice Lee's significant-strike output
Three inches of height and 18 UFC bouts against 3
Recent first-round wins over Elkins, Rodriguez and Ramos
Lee is 1-2 in roster fights and was stopped in 65 seconds by Amil
Erosa was knocked out by Douglas in March and loses by knockout often
6.31 absorbed against 3.82
Age 30 against 37
72% takedown defence
A 57% lean on a man on a two-fight skid should not be sold harder than this
In roughly 57 of 100 readings, Julian Erosa turns the first round into a scramble and wins by submission (24%) or strikes (22%), with only an 11% decision share because that is not how his wins look. The same chaos is why the lean is narrow.
In the other 43, JeongYeong Lee either survives to a decision (18%), finds the chin that Douglas found (16%), or lands an armbar (9%) that his UFC rate has not made a habit.
Erosa 57 / Lee 43, conviction 4 out of 10. A finisher's lean over a 1-2 roster record, with the favorite's last fight a knockout loss sitting on top of the file.
