Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Can Yoo Beat Aswell Jr. at UFC 331?
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Can Yoo Beat Aswell Jr. at UFC 331?
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Analyze UFC 331 odds, records, styles, matchup, best bet, and fight prediction.
The Michael Aswell Jr. vs JooSang Yoo Betting Prediction for UFC 331 points toward JooSang Yoo on the moneyline in this featherweight matchup.
Yoo enters the fight with a 9-1 professional record and is coming off a first-round knockout victory over Jeka Saragih in his UFC debut. Aswell Jr. enters with an 11-5 record and has won 10 fights outside the UFC, but he has dropped his last two UFC appearances by decision.
The current betting market has Yoo around -285 to -295, while Aswell Jr. is available around +215 to +220 depending on the market. That makes Yoo the clear favorite, although the price requires a relatively high win probability to justify a straight moneyline wager.
The physical matchup is close. Aswell Jr. is listed at 5-foot-8 with a 69-inch reach, while Yoo is listed at 5-foot-7 with a 71-inch reach. Yoo therefore gives up an inch of height but owns a two-inch reach advantage.
Best Bet: JooSang Yoo moneyline
Secondary Bet: JooSang Yoo by decision
Projected Result: JooSang Yoo wins by decision
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Fight Overview
Michael Aswell Jr. and JooSang Yoo meet Saturday, September 19, 2026, at UFC 331 in Los Angeles.
The matchup is scheduled for the featherweight division and appears on the preliminary portion of the card. The event takes place at Crypto.com Arena, with the main card scheduled for later that evening.
This is an important fight for both athletes.
Yoo is trying to build momentum after making an immediate impression in his UFC debut. The South Korean fighter stopped Saragih in only 28 seconds in June 2025 before suffering the first loss of his professional career against Daniel Santos later that year.
Aswell Jr. has considerably more UFC experience.
He has competed several times inside the Octagon and owns an overall professional record of 11-5. His recent UFC run, however, has produced mixed results. He lost unanimous decisions to Luke Riley and Gaston Bolanos in 2026 after previously stopping Lucas Almeida in the first round.
That creates an interesting contrast.
Yoo has the better overall record and enters off a spectacular UFC debut, while Aswell Jr. has the experience of fighting deeper into UFC-level competition.
Key Fight Information
| Category | Michael Aswell Jr. | JooSang Yoo |
|---|---|---|
| Record | 11-5 | 9-1 |
| Division | Featherweight | Featherweight |
| Height | 5’8″ | 5’7″ |
| Reach | 69″ | 71″ |
| Age | 25 | 32 |
| Stance | Orthodox | Orthodox |
| UFC 331 | vs. JooSang Yoo | vs. Michael Aswell Jr. |
| Recent UFC Result | Decision loss | First-round KO win |
| Current ML Range | +215 to +220 | -285 to -295 |
ESPN lists Yoo at 9-1 overall and Aswell at 11-5. The same matchup data lists Aswell Jr. at 5-foot-8 and Yoo at 5-foot-7, with Yoo holding the longer reach.
The records also tell an important story.
Aswell Jr. has fought more professional bouts, but Yoo has lost only once.
That one loss came against Daniel Santos in October 2025. Before that defeat, Yoo had built an unbeaten professional run and entered the UFC with substantial momentum.
JooSang Yoo’s UFC Experience
Yoo made his UFC debut against Jeka Saragih and needed only 28 seconds to finish the fight.
That result immediately placed attention on the South Korean featherweight.
Yoo followed that victory by facing Daniel Santos in October 2025. The fight ended in the second round by TKO, giving Yoo the first loss of his professional career.
The loss is important when evaluating this matchup because it shows that Yoo is not unbeatable.
It also provides evidence that opponents can find success against him.
However, Yoo’s overall record remains impressive.
He enters this fight at 9-1, with four knockout or TKO victories and one submission victory listed on his ESPN profile.
His finishing ability is one of the main reasons he is favored against Aswell Jr.
Yoo can create problems quickly if he finds his range.
Yoo’s Striking Advantage
The statistical profiles suggest Yoo has been the more efficient striker.
One comparative database lists Yoo at 6.36 significant strikes landed per minute with 59% striking accuracy. Aswell Jr. is listed at 7.60 significant strikes landed per minute with 43% accuracy.
Those numbers require context.
Aswell Jr. actually has the higher raw significant-strike volume in the database.
The difference is efficiency.
Yoo lands a higher percentage of his attempted significant strikes, while Aswell Jr. throws at a higher rate.
That could make this fight particularly interesting in the opening rounds.
If Aswell Jr. maintains a high pace while avoiding clean counters, he can force Yoo to work defensively.
If Yoo consistently lands the cleaner shots, however, Aswell Jr.’s higher output could become less important.
Accuracy and shot selection may ultimately matter more than raw volume.
Michael Aswell Jr.’s UFC Experience
Aswell Jr. brings a different type of experience into UFC 331.
He has already fought multiple times in the organization and has faced several different styles.
His UFC record has included both wins and losses, and his most recent stretch has tested his ability to fight through difficult opponents.
According to the available fight history, Aswell Jr. lost unanimous decisions to Luke Riley in March 2026 and Gaston Bolanos in June 2026. He previously defeated Lucas Almeida by first-round TKO in October 2025.
That recent sequence matters.
Aswell Jr. has gone the distance in his two most recent UFC fights.
That means he has recent experience fighting through three-round matchups at the UFC level.
Yoo’s UFC sample is much smaller.
That creates one of the central questions in the Michael Aswell Jr. vs JooSang Yoo Betting Prediction:
Can Yoo’s explosiveness overcome Aswell Jr.’s experience in longer UFC fights?
Aswell Jr.’s Volume Could Be Important
The comparative statistics show Aswell Jr. landing 7.60 significant strikes per minute, compared with 6.36 for Yoo.
That gives Aswell Jr. a potential path to success.
He does not necessarily need to win every individual exchange.
Instead, he can attempt to create a high-volume fight and force Yoo to defend continuously.
The problem is that Aswell Jr.’s accuracy is listed at only 43%.
Yoo’s 59% accuracy is considerably higher.
That means Aswell Jr. may need more attempts to produce the same amount of effective offense.
Against a dangerous counter striker, throwing more punches can become a liability if the shots are not landing cleanly.
Aswell Jr. therefore needs to balance volume with defensive responsibility.
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Physical Matchup
The physical measurements are surprisingly close.
Aswell Jr. is listed at 5-foot-8 with a 69-inch reach.
Yoo is listed at 5-foot-7 with a 71-inch reach.
That gives Aswell Jr. a one-inch height advantage.
Yoo has the two-inch reach advantage.
The reach difference could matter more than the height difference because both fighters are listed as orthodox.
Yoo can potentially maintain distance while still landing the cleaner straight shots.
Aswell Jr. may need to enter deeper into Yoo’s range to generate his higher-volume offense.
That creates opportunities for both fighters.
Aswell Jr. can use his slightly taller frame to work behind his offense.
Yoo can use his longer reach to control the distance.
The fighter who dictates range could have a major advantage.
The Age and Experience Factor
Aswell Jr. is listed at 25 years old, while Yoo is 32.
The age difference is notable, but it does not automatically determine the matchup.
Aswell Jr. has more professional fights despite being younger.
Yoo, meanwhile, has more overall maturity and has already experienced the highs and lows of his UFC career.
The key question is how each fighter handles the pace.
If the fight becomes technical and extended, experience could become increasingly important.
If exchanges become chaotic and explosive, Yoo’s finishing ability becomes more relevant.
Yoo’s Biggest Strength: Finishing Ability
Yoo’s record includes five finishes by knockout or TKO and one submission victory according to his ESPN profile.
His UFC debut is the clearest example.
He stopped Saragih in just 28 seconds.
That means Aswell Jr. cannot afford a slow start.
The opening minutes will be important because Yoo has demonstrated that he can capitalize quickly when he finds the right opportunity.
Aswell Jr. should therefore prioritize defensive awareness early.
He does not need to win the first minute.
He needs to establish his range, force Yoo to respect his offense and avoid giving the favorite a clean counter opportunity.
Aswell Jr.’s Biggest Strength: UFC Experience
The strongest argument for Aswell Jr. is experience.
He has already competed against UFC-level opponents multiple times.
He also has experience fighting through three rounds.
That matters because Yoo has not accumulated the same amount of UFC experience.
Aswell Jr. knows what it is like to fight under the UFC spotlight.
He has also experienced both winning and losing inside the organization.
That can help with composure.
If Yoo fails to find an early finish, Aswell Jr. could become increasingly comfortable.
That is why the underdog should not be dismissed simply because of the current moneyline.
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Recent Form
Recent form favors Yoo from a momentum perspective.
Yoo’s UFC debut resulted in a 28-second knockout, although he subsequently lost to Daniel Santos by second-round TKO.
Aswell Jr. has lost his last two UFC fights by decision.
Those results came against Luke Riley and Gaston Bolanos.
There is an important distinction here.
Aswell Jr.’s losses were decisions rather than stoppages.
That demonstrates that he has been able to survive difficult UFC matchups and remain competitive long enough to reach the scorecards.
Yoo has shown greater finishing upside.
Aswell Jr. has shown greater recent experience in extended fights.
That contrast is central to the matchup.
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Striking Matchup
The striking matchup should be one of the most important factors.
Yoo’s 59% significant-strike accuracy gives him a statistical efficiency advantage over Aswell Jr.’s 43%.
Aswell Jr., however, is listed with the higher striking volume.
That creates two different paths.
Aswell Jr. can attempt to overwhelm Yoo with activity.
Yoo can attempt to make every exchange count by landing cleaner and more accurate strikes.
The first fighter to establish the preferred rhythm could control the fight.
If Aswell Jr. is able to keep Yoo moving backward, the underdog can potentially accumulate rounds through activity.
If Yoo is comfortable standing in the pocket and countering, his accuracy could become the deciding factor.
Grappling Could Change the Fight
The striking numbers receive most of the attention, but the grappling component should not be ignored.
One comparative statistical profile lists Aswell Jr. with a small takedown average while Yoo has no recorded takedown average in that database. It also lists Yoo with 50% takedown defense and Aswell Jr. with 56%.
Those numbers are based on limited samples and should not be treated as a complete description of either fighter’s grappling ability.
Still, wrestling could be an important tactical option.
If Aswell Jr. cannot consistently win the striking exchanges, mixing in takedowns could disrupt Yoo’s rhythm.
Likewise, Yoo can benefit if he forces the fight back to the feet quickly.
The fighter who dictates where the exchanges happen will have a significant strategic advantage.
Yoo’s Path to Victory
Yoo has several ways to win this fight.
1. Win the range battle
His two-inch reach advantage gives him a useful tool for controlling distance.
2. Force Aswell Jr. to overextend
Aswell Jr.’s higher striking volume could create counter opportunities if his accuracy does not improve.
3. Attack early
Yoo has already demonstrated a willingness and ability to finish fights quickly.
4. Maintain striking efficiency
Yoo’s 59% significant-strike accuracy is a major statistical advantage.
5. Avoid unnecessary exchanges
Yoo does not need to match Aswell Jr.’s raw volume if he continues landing cleaner shots.
Aswell Jr.’s Path to Victory
The underdog has a realistic route to winning as well.
1. Increase the pace
A high-output fight could reduce Yoo’s opportunities to set his preferred rhythm.
2. Use his height
Aswell Jr. has a one-inch height advantage and can attempt to use it to maintain distance.
3. Mix in grappling
Changing levels could prevent Yoo from settling into a striking rhythm.
4. Push the fight beyond the early rounds
Yoo’s finishing threat is most dangerous when he can dictate the early exchanges.
5. Make Yoo work
Aswell Jr. can use volume and movement to make Yoo fight at a pace he may not prefer.
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Moneyline Analysis
The current market has Yoo priced around -285 to -295, while Aswell Jr. is around +215 to +220.
That makes Yoo a substantial favorite.
At that price, the question is not simply whether Yoo can win.
The question is whether his expected win probability is high enough to justify the moneyline.
The market is clearly giving Yoo credit for his 9-1 record, his finishing ability and his impressive UFC debut.
Aswell Jr.’s experience and recent ability to reach the scorecards provide the main argument against laying a large price.
Still, Yoo’s combination of accuracy, reach and finishing upside makes him the preferred side.
Best Bet: JooSang Yoo moneyline
For bettors looking for a more aggressive position, Yoo by decision provides a different route, but the straight moneyline carries less dependence on the exact method of victory.
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Method of Victory
A decision is an interesting possibility.
Aswell Jr. has gone to the scorecards in each of his two most recent UFC losses.
That suggests he can survive against high-level opposition for 15 minutes.
Yoo has demonstrated finishing ability, but his only UFC loss also came by stoppage.
The fight could therefore come down to whether Yoo can maintain his efficiency over three rounds.
If Yoo controls the distance but does not find a finish, he has a strong path to winning rounds through cleaner striking.
If Aswell Jr. forces a high-volume fight, the judges could have a more difficult decision.
That is why the decision market is worth considering as a secondary angle rather than making the entire prediction dependent on an early finish.
Why Yoo Is the Preferred Pick
There are several reasons to favor Yoo.
First, his overall record is excellent at 9-1.
Second, his significant-strike accuracy is considerably higher than Aswell Jr.’s in the available comparative data.
Third, Yoo has a two-inch reach advantage despite giving up an inch of height.
Fourth, Yoo demonstrated immediate finishing ability in his UFC debut.
Finally, the betting market already reflects a strong expectation that Yoo wins this matchup.
The main concern is price.
At approximately -295, there is not much room for error.
Aswell Jr. is experienced, younger and capable of taking a fight to the scorecards.
That makes Yoo a preferred side, but the moneyline should be treated differently from a modest favorite.
Why Aswell Jr. Could Pull the Upset
The underdog has several advantages that should not be overlooked.
Aswell Jr. has more professional fights and considerably more UFC experience.
He is also listed with a higher significant-strike output.
If he can maintain that pace while improving his accuracy, he could force Yoo into more exchanges than the favorite wants.
His recent UFC losses were decisions rather than knockouts.
That suggests Aswell Jr. can remain competitive deep into a fight even when facing quality opposition.
The +215 to +220 range also means the market gives the underdog a meaningful upset path.
The primary concern is whether Aswell Jr. can produce enough clean offense to overcome Yoo’s accuracy and finishing threat.
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Fight Script
The opening round should be especially important.
Yoo is likely to look for opportunities to establish his range and test Aswell Jr.’s reactions.
Aswell Jr. should attempt to use movement and volume rather than standing directly in front of Yoo.
If Aswell Jr. starts aggressively, the fight could become fast-paced.
That would benefit the underdog if he can maintain accuracy.
Yoo, however, has shown that he can capitalize on mistakes.
A cleaner, more technical first round could therefore favor the favorite.
The second round should provide a clearer indication of the matchup.
If Yoo is consistently landing the cleaner strikes, Aswell Jr. may need to increase his offensive output.
If Aswell Jr. is forcing Yoo backward and controlling the pace, the underdog’s chances improve.
The third round could become a battle of volume versus efficiency.
That is where the decision prediction becomes relevant.
Expected Fight Pace
Neither fighter needs to rush into unnecessary exchanges.
Yoo’s accuracy gives him a reason to remain patient.
Aswell Jr.’s volume gives him a reason to stay active.
The result could be a tactical featherweight fight in which both fighters attempt to establish their preferred range.
If Yoo lands the cleaner shots, the judges may favor him even if Aswell Jr. throws more.
If Aswell Jr. lands enough volume while defending Yoo’s counters, he can make the scorecards much closer.
The fight’s pace will therefore depend heavily on who wins the range battle early.
UFC 331 Venue and Event Context
The fight takes place at UFC 331 in Los Angeles on September 19, 2026.
The event is headlined by Joshua Van against Alexandre Pantoja in a flyweight title rematch. The main card is scheduled for 9 p.m. ET, with the preliminary fights earlier in the evening.
Aswell Jr. vs. Yoo is part of the preliminary card.
Both fighters have an opportunity to gain momentum with a strong performance.
For Yoo, another victory would help him rebuild after his first professional defeat.
For Aswell Jr., a win would halt a two-fight UFC losing streak and provide a major boost against a heavily favored opponent.
Michael Aswell Jr. vs JooSang Yoo Betting Prediction: Final Pick
The preferred pick is JooSang Yoo moneyline.
Yoo’s 9-1 record, striking accuracy, reach advantage and finishing ability give him the statistical and stylistic profile needed to control this matchup.
Aswell Jr. remains dangerous.
His 11-5 record includes substantial professional experience, and he has demonstrated that he can survive three-round UFC fights.
The main issue for Aswell Jr. is efficiency.
If he throws at a high volume without improving his accuracy, Yoo could land the cleaner shots while avoiding unnecessary exchanges.
That would allow Yoo to win rounds without needing another 28-second finish.
Best Bet: JooSang Yoo moneyline
Secondary Bet: JooSang Yoo by decision
Projected Result: JooSang Yoo wins by decision
Key Stats to Watch
JooSang Yoo
- 9-1 professional record
- 4 KO/TKO wins
- 1 submission win
- 59% significant-strike accuracy
- 6.36 significant strikes landed per minute
- 71-inch reach
- 28-second UFC debut victory
Michael Aswell Jr.
- 11-5 professional record
- 7.60 significant strikes landed per minute
- 43% significant-strike accuracy
- 5-foot-8 height
- 69-inch reach
- Two recent UFC losses by decision
These numbers show why the fight is more competitive stylistically than the moneyline might suggest.
Yoo has the accuracy and finishing edge.
Aswell Jr. has the volume and UFC experience.
Follow-Up Questions
Who is favored in Michael Aswell Jr. vs JooSang Yoo?
JooSang Yoo is the betting favorite. Current market prices have generally placed him around -285 to -295, with Aswell Jr. around +215 to +220.
What is Michael Aswell Jr.’s record?
Aswell Jr. enters the matchup with an 11-5 professional record.
What is JooSang Yoo’s record?
Yoo is 9-1 professionally.
When is Michael Aswell Jr. vs JooSang Yoo?
The fight is scheduled for Saturday, September 19, 2026, at UFC 331.
Where is Michael Aswell Jr. vs JooSang Yoo?
The fight is scheduled for Crypto.com Arena in Los Angeles, California.
What division is Michael Aswell Jr. vs JooSang Yoo?
The matchup is scheduled for the UFC featherweight division.
Who has the reach advantage?
JooSang Yoo has the longer reach at 71 inches compared with 69 inches for Aswell Jr.
Who is taller?
Michael Aswell Jr. is listed at 5-foot-8, while JooSang Yoo is listed at 5-foot-7.
How did JooSang Yoo perform in his UFC debut?
Yoo stopped Jeka Saragih by TKO in just 28 seconds in his UFC debut.
What is the Michael Aswell Jr. vs JooSang Yoo Betting Prediction?
The preferred pick is JooSang Yoo moneyline, with Yoo projected to win a competitive three-round fight. A secondary lean is Yoo by decision.
Final Michael Aswell Jr. vs JooSang Yoo Betting Prediction
The Michael Aswell Jr. vs JooSang Yoo Betting Prediction favors JooSang Yoo because of his combination of striking accuracy, reach and finishing ability.
Yoo enters UFC 331 at 9-1 and has already shown that he can finish an opponent immediately at the UFC level. His 28-second knockout of Jeka Saragih remains the strongest example of his offensive ceiling.
Aswell Jr. brings a different challenge.
At 11-5, he has more professional experience and a larger UFC sample. His two most recent UFC defeats went to the scorecards, showing that he can remain competitive over 15 minutes.
The statistical matchup also creates an interesting contrast.
Aswell Jr. is listed with a higher significant-strike output, but Yoo has a substantially better accuracy rate.
That could make clean striking more important than overall volume.
Yoo also has a two-inch reach advantage despite giving up one inch of height.
If he controls the distance and forces Aswell Jr. to reach for exchanges, he should have opportunities to land the cleaner shots.
The biggest concern with the Yoo moneyline is the price. With the market around -285 to -295, bettors are paying for a strong favorite rather than taking a small-moneyline position.
Still, Yoo’s overall profile makes him the preferred side.
Best Bet: JooSang Yoo moneyline
Secondary Bet: JooSang Yoo by decision
Projected Result: JooSang Yoo wins by decision
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