September 19, 2026 · Crypto.com Arena, Los Angeles, United States
Aswell
11-5-0
UnrankedHouston, Texas | 25 years old
Yoo
9-1-0
UnrankedSouth Korea | 32 years old
The Chin vs. the Scorecards
Nobody has put Aswell on the canvas in the UFC. The judges are what keep beating him, and Yoo carries the tools that usually sway them.
Conviction
Conviction 5, because Aswell's path is concrete and has a recent precedent: Santos beat Yoo with pressure and a left through the low guard, and Aswell brings more pressure, has never been dropped, and shows up active against a man returning from an injury and nearly a year out. That's worth 45% and not a point less. What keeps Yoo in front is a number built over 27 judged rounds, not one fight: Aswell has won just 6 of them on official UFC scorecards, including against Bolaños, when he landed more strikes than his opponent. His pressure has proven it survives; it hasn't proven it scores. The honest caveat is Yoo's sample: the 58% accuracy and the leg kicks come from under six minutes in the UFC.
Conviction 5, because Aswell's path is concrete and has a recent precedent: Santos beat Yoo with pressure and a left through the low guard, and Aswell brings more pressure, has never been dropped, and shows up active against a man returning from an injury and nearly a year out. That's worth 45% and not a point less. What keeps Yoo in front is a number built over 27 judged rounds, not one fight: Aswell has won just 6 of them on official UFC scorecards, including against Bolaños, when he landed more strikes than his opponent. His pressure has proven it survives; it hasn't proven it scores. The honest caveat is Yoo's sample: the 58% accuracy and the leg kicks come from under six minutes in the UFC.
THE PARADOX
Durability Doesn't Win Rounds
Michael Aswell Jr. is one of the hardest men to put away at featherweight. Across five fights in the UFC and on the Contender Series, he's absorbed 434 significant strikes and never hit the canvas. Luke Riley landed 100 and heard the final horn. Bolaji Oki landed 136. The problem is the other side of the ledger: on official UFC scorecards, Aswell has won just 6 of 27 rounds. Against Bolaños he outlanded the Peruvian 105 to 87, busted his face open, hurt him in the third, and lost 29-28 on all three cards. Volume without clean shots, and the judges make you pay for it. JooSang Yoo is the opposite in almost every way. He counters, he chops the leg, he lands 58% of what he throws, and he has the hands that shut Jeka Saragih's lights off in 28 seconds. The catch is that all of it fits inside 5 minutes and 49 seconds of UFC cage time. The only time an opponent survived the opening and got a round to read him, Daniel Santos walked him down, found the low hands and dropped him 21 seconds into round 2. Then came the injury, the withdrawal from the Bolaños fight, and nearly a year on the shelf. And Aswell is exactly the kind of fighter who survives the opening.
Michael Aswell Jr. is one of the hardest men to put away at featherweight. Across five fights in the UFC and on the Contender Series, he's absorbed 434 significant strikes and never hit the canvas. Luke Riley landed 100 and heard the final horn. Bolaji Oki landed 136. The problem is the other side of the ledger: on official UFC scorecards, Aswell has won just 6 of 27 rounds. Against Bolaños he outlanded the Peruvian 105 to 87, busted his face open, hurt him in the third, and lost 29-28 on all three cards. Volume without clean shots, and the judges make you pay for it. JooSang Yoo is the opposite in almost every way. He counters, he chops the leg, he lands 58% of what he throws, and he has the hands that shut Jeka Saragih's lights off in 28 seconds. The catch is that all of it fits inside 5 minutes and 49 seconds of UFC cage time. The only time an opponent survived the opening and got a round to read him, Daniel Santos walked him down, found the low hands and dropped him 21 seconds into round 2. Then came the injury, the withdrawal from the Bolaños fight, and nearly a year on the shelf. And Aswell is exactly the kind of fighter who survives the opening.
Truth A
Aswell eats everything and keeps walking forward for 15 minutes. Yoo got dropped by pressure the only time a UFC opponent reached round 2 with him, and he's coming back from an injury and nearly a year out.
Truth B
Surviving isn't winning. Aswell has lost all three of his UFC decisions while winning just 6 of 27 rounds on the cards, and Yoo carries exactly what tends to take rounds off him: clean counters and leg kicks.
Tale of the Tape
Aswell is seven years younger
Yoo has a 2-inch reach edge
Yoo returns from nearly a year out
Current Form
Michael Aswell Jr.
Walked in a heavy favorite and outlanded him 105 to 87. Cut the Peruvian open and hurt him in round 3, but that was the only round he got on the cards. All three judges gave Bolaños round 1 even though Aswell outlanded him 47 to 29, then round 2 on leg kicks and a takedown: 29-28 across the board.
Unanimous DecisionCo-main in London against the unbeaten hometown prospect. Riley landed 100 strikes at 56% to Aswell's 61 at 33% and swept the cards 30-27. Aswell ate all of it and finished on his feet.
Unanimous DecisionFirst UFC win, in Rio. Closed the distance behind the right hand, dropped the Brazilian twice and finished it with punches and elbows on top at 1:42.
TKO R1Short-notice debut up at lightweight. Both men threw more than 300 significant strikes; all three judges gave Aswell round 1 and Oki the last two, and Oki took it 29-28 across the board.
Unanimous DecisionFury FC 99, back on the Texas regional scene after coming up short on the Contender Series. A razor-thin win that kept his name on the call-up list.
Split DecisionTwo straight losses and 1-3 in the UFC. This is a must-win spot. But all three of his UFC losses came on the cards: an unbeaten prospect fighting at home, a veteran who stole rounds with kicks, and a short-notice debut up a weight class. He's 25, back three months after his last fight, and nobody has knocked him out or submitted him in 16 pro bouts. The issue isn't toughness or pace, it's conversion: on official UFC scorecards, he's won just 6 of 27 rounds.
JooSang Yoo
Stepped in for Doo Ho Choi at a 153-pound catchweight. Outlanded Santos 28 to 17 in round 1 with the jab and leg kicks, but kept his hands low. Santos pressured, dropped him with a left and finished it on the mat 21 seconds into round 2.
TKO R2UFC 316 debut. A perfectly timed counter left hook put the Indonesian out at 0:28 and earned a performance bonus.
KO R1ZFN 2, The Korean Zombie's promotion. A 1:15 knockout that earned the UFC contract.
KO R1ZFN 1. The only time in his last five fights that Yoo needed all 15 minutes, and he won it on all three cards.
Unanimous DecisionWon the AFC and HEAT featherweight belts in one night, in 32 seconds.
TKO R1Yoo hasn't fought since October 2025. After getting knocked out by Santos, he was booked against Gaston Bolaños for March and pulled out injured. That's nearly a year on the shelf, his first fight after the first knockout loss of his career, and his first cut to 145 since June 2025. The talent is real: AFC and HEAT champion, a 28-second knockout in his debut, weekly sessions with The Korean Zombie. But his entire UFC run adds up to 5 minutes and 49 seconds of cage time.
Level of Competition
No common opponents, but one name ties them together: Gaston Bolaños. Yoo was booked against him in March and withdrew injured; Aswell got the Peruvian in June and lost on the cards. Neither man has faced a ranked opponent in the UFC. The difference is sample size: Aswell has four UFC fights against veterans and an unbeaten riser, while neither of Yoo's two UFC fights made it past 5:21.
Statistical Comparison
Sig. Strikes per Minute
Yoo's numbers come from just 5:49 of UFC cage time
Striking Accuracy (%)
Yoo is more accurate, on a sample of 63 attempted strikes
Strikes Absorbed per Minute
Aswell's hole: more than seven strikes absorbed per minute
Striking Defense (%)
Takedowns per 15 Min
Neither man takes the fight to the mat
Takedown Accuracy (%)
Takedown Defense (%)
Aswell has been taken down 4 times on 9 attempts in the UFC and on the Contender Series; Yoo, once on 2
Submissions per 15 Min
Aswell leads in 4 categories · Yoo leads in 3
Win & Loss Distribution
Wins
KO/TKO
Submission
Decision
Both men can put you away, just in opposite ways. Aswell has six knockouts in 11 wins, built on pressure and smothering volume, exactly how he broke Almeida. Yoo has four in nine and does his damage on the counter and early: Saragih in 28 seconds, Kuramoto in 32, Kawana in 1:15. Neither is a threat on the mat, with a single submission between them across 20 wins. Aswell's five decisions and Yoo's four show both can go 15 minutes, but only the American has done it in the UFC.
Losses
KO/TKO
Submission
Decision
This is where the fight lives. All five of Aswell's losses came on the scorecards: nobody has knocked him out or submitted him in 16 pro fights, not even Luke Riley, who landed 100 strikes on him. Yoo has just one loss, far too small a sample to call a pattern, but it came by knockout, against the first UFC opponent to make it to round 2 with him. For the method, the read is simple: the Yoo who wins this is the Yoo who banks rounds, not the one who flattens people. The Aswell who wins can do either.
Skills Profile
Aswell
vs
Yoo
Striking at Range
+1 Yoo
Yoo works the jab and the leg kick from the outside, landing 11 strikes to Santos' legs in just over five minutes, while Aswell barely kicks at all.
Close-Range Striking
+1 Aswell
Aswell closes the distance nonstop and lands 7.60 significant strikes per minute, the higher output in this fight.
Knockout Power
+1 Yoo
Yoo has three first-round knockouts in his last five fights; Aswell has six KOs in 11 wins but only one in the UFC.
Striking Defense
+1 Yoo
Aswell absorbs 7.03 significant strikes per minute, far too many; Yoo sits at 4.99, but on under six minutes of UFC data and with the low hands Santos exploited.
Queixo e Resistência
+3 Aswell
Aswell has never been knocked down in the UFC or on the Contender Series despite 434 significant strikes absorbed; Yoo was dropped and stopped the only time a UFC opponent reached round 2 with him.
Cardio (3 Rounds)
+2 Aswell
Aswell won round 3 on the stat sheet against Oki and Bolaños and is back three months after his last fight; Yoo has never been past round 2 in the UFC and returns from nearly a year out.
On paper this is a pure stand-up fight: Yoo has never attempted a takedown in the UFC and Aswell barely does. Yoo has the heavier hands, the accuracy and the leg kick; Aswell has the volume, the chin and the gas tank. The question is which of those the judges end up seeing.
Final Prediction
The Thesis
Conviction5/10The thesis is: JooSang Yoo wins on the scorecards.
The thesis is: JooSang Yoo wins on the scorecards.
First, because the way Aswell loses is alive and well: he's won just 6 of 27 rounds on official UFC scorecards and lost all three of his UFC decisions, and against Bolaños what stole rounds were kicks to the leg and body, exactly the tool Yoo showed when he landed 11 strikes to Santos' legs.
Second, because Aswell absorbs 7.03 significant strikes per minute with 52% defense, which gives Yoo's cleaner counters, landing at 58%, a target all night. And it's not the knockout: nobody has dropped Aswell across 434 significant strikes absorbed, so the Yoo who wins is the one who banks rounds.
The path is Yoo countering Aswell's straight-line entries in round 1, chopping the lead leg to slow the pressure in round 2, and managing round 3 without standing still in a firefight. It falls apart if Yoo's low hands show up again against more volume than Santos ever threw, or if nearly a year out and the injury drain his gas tank by the third.
What Breaks This Pick
- 01
If Yoo comes back with the low hands from UFC 320 and Aswell lands the one-two in round 1, this becomes the Santos script and the counter-punching thesis is gone.
- 02
If Yoo can't get to the lead leg early and gets forced to stand and trade with Aswell's volume, his accuracy stops mattering on the cards.
- 03
If Yoo's gas tank dips in round 2 after nearly a year out, round 3 belongs to Aswell, who won the third on the stat sheet against Oki and Bolaños.
- 04
If Aswell mixes in takedowns to steal time, the way he did in round 3 against Riley, he takes away the stand-up fight where Yoo's precision counts.
Underdog Path
Aswell sprints across the cage at the bell like always, accepts eating Yoo's counters and keeps firing the one-two at his usual volume. He doesn't need to be cleaner: he needs Yoo, hands low and nearly a year removed from his last fight, to open the same door Santos found. A right hand through the guard late in round 1 or early in round 2 drops the Korean, and Aswell does what he did to Almeida, hunting him down and finishing it on the mat. If the knockout doesn't come, his volume and gas tank take round 3 from a man who has never fought three rounds in the UFC.
Required Conditions
- Survive the counter left early, the way he's survived 434 significant strikes absorbed in the UFC and on the Contender Series
- Hold the 250 to 300 attempted significant strikes he sustained against Oki, Bolaños and on the Contender Series, forcing Yoo to exchange with his hands low
- Keep Yoo's leg kicks from stalling his entries, the way Bolaños managed in round 2
- Win round 3 on conditioning, the way he won it on the stat sheet against Oki and Bolaños
— Precedent: Daniel Santos vs JooSang Yoo (UFC 320, October 2025): Yoo outlanded Santos 28 to 17 in round 1 but kept his hands low, and the Brazilian pressured, dropped him with a left and finished it on the mat 21 seconds into round 2.
Verdict
Winner
JooSang Yoo
Method
Decision
Most Likely
- 01
Winner
Michael Aswell Jr.
Aswell because implies roughly a 35% chance and his path is worth close to 45%: pressure against a man who got dropped by pressure in his last fight, returns from an injury and nearly a year out, and whose knockout power runs into a chin nobody has cracked. The line has already moved from, and it's still overpricing the 1-3 UFC record and the loss as a big favorite to Bolaños. Breaks down if Yoo lands the counter early and marks up the leg, turning this into another Aswell decision loss.
- 02
Method
Yoo by decision
Yoo by decision because it's the one outcome where both trends line up: Aswell loses on the cards, all five career losses, and has never been knocked out, while Yoo scores with accuracy and leg kicks. The public will chase the Yoo knockout off the Saragih highlight. Breaks down if Yoo's gas tank can't hold for three rounds after nearly a year out.
- 03
How It Ends (Either Fighter)
Fight goes to decision
Decision because Aswell has gone the distance in four of his last five and has never lost before the final bell, and Yoo's power runs into that chin. Breaks down if Yoo's low guard shows up against the American's volume, which is the likeliest way anybody gets finished here.
Most Likely Outcome
Michael Aswell Jr.
It's the biggest gap between the analysis and the market, not the prediction. The pick is Yoo on the cards in a close fight; the underdog is priced like a 35% shot, and his path, backed by a precedent less than a year old, is worth close to 45%. Conviction 5 means a small bet, not a confident one.
Stats That Matter
6 of 27
rounds Aswell has won on official UFC scorecards, across three decision losses
He outlanded Bolaños 105 to 87 and still lost 29-28 on all three cards
ZERO
knockdowns suffered by Aswell in five UFC and Contender Series fights, with 434 significant strikes absorbed
Yoo's power runs straight into his opponent's best attribute
5:49
Yoo's total UFC cage time, across two fights
Never past round 2 in the promotion, and returning from an injury and nearly a year out
The Trap
Yoo by knockout
The Saragih highlight is going to sell Yoo by knockout, and the market already has the Korean. But Aswell has never been knocked down in the UFC or on the Contender Series across 434 significant strikes absorbed, and all five losses of his career came on the scorecards. If Yoo wins, it's far likelier on points: his knockout runs straight into the best thing his opponent has.
The Saragih highlight is going to sell Yoo by knockout, and the market already has the Korean. But Aswell has never been knocked down in the UFC or on the Contender Series across 434 significant strikes absorbed, and all five losses of his career came on the scorecards. If Yoo wins, it's far likelier on points: his knockout runs straight into the best thing his opponent has.
COLISEUM - Statistical and tactical analysis. Data sourced from ufcstats.com and public sources.
Michael "The Texas Kid" Aswell Jr. vs JooSang "Zombie Jr." Yoo | UFC 331: Van vs. Pantoja 2 | September 19, 2026 | Crypto.com Arena, Los Angeles, United States
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