Get the full Ketlen Vieira vs. Macy Chiasson prediction, betting picks, prop bets and same-fight parlay ideas for UFC Vegas 107.
Two seasoned bantamweight contenders meet in a razor-close showdown this Saturday as Ketlen “Fenomeno” Vieira takes on Macy Chiasson at UFC Vegas 107. Both fighters enter the bout at 33 years old with plenty of experience inside the Octagon, and the oddsmakers can barely separate them.
Vieira brings superior grappling and a strong submission resume. Chiasson counters with superior reach, height, and a more active striking game. The fight could go anywhere — and that’s what makes this one a can’t-miss clash in the women’s 135-lb division.
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📺 Where to Watch UFC Vegas 107: Ketlen Vieira vs. Macy Chiasson? (May 31, 2025)
| Detail | Info |
| 🗓 Date | Saturday, May 31, 2025 |
| 🏟 Venue | UFC Apex, Las Vegas |
| 📺 Broadcast | ESPN / ESPN+ |
| ⏰ Main Card | ~10:00 PM ET |
💸 Betting Odds
| Fighter | Odds |
| Ketlen Vieira | -105 |
| Macy Chiasson | -115 |
📊 This is as close as it gets — a pick’em bout with razor-thin margins at the sportsbooks.
🧬 Tale of the Tape
| Attribute | Ketlen Vieira | Macy Chiasson |
| 🆚 Record | 14-4-0 | 11-3-0 |
| 🧍♀️ Height | 5’8″ | 5’11” |
| 📏 Reach | 68″ | 72″ |
| ⚖️ Weight | 135 lbs | 135 lbs |
| 🎯 Strikes Landed/Min | 2.92 | 3.77 |
| 🔥 Striking Accuracy | 41% | 46% |
| 💥 Strikes Absorbed/Min | 3.90 | 2.79 |
| 🛡️ Strike Defense | 51% | 44% |
| 🤼 Takedowns/15 Min | 1.39 | 0.80 (approx) |
| 🧷 Takedown Accuracy | 44% | 38% |
| 🛑 Takedown Defense | 88% | 70% |
| 🔒 Sub Attempts/15 Min | 0.6 | 0.4 |
📊 Betting Trends
| Fighter | Last Fight Result | Method |
| Ketlen Vieira | ❌ Loss to Kayla Harrison | Decision (Rd 3) |
| Macy Chiasson | ✅ Win vs Mayra Bueno Silva | Doctor Stoppage (Rd 2) |
Vieira landed 24 of 61 significant strikes in her last outing (39%).- Chiasson connected on 58% of her sig. strikes vs. Silva (50 of 85).
- Chiasson has won 3 of her last 4 and is more active in striking exchanges.
🚑 Injury Report
| Fighter | Status | Notes |
| Ketlen Vieira | ✅ Active | Returning after loss to Harrison |
| Macy Chiasson | ✅ Active | Healthy after TKO (cuts) win |
🔍 Key Matchup
The bout hinges on two factors:
- Can Vieira impose her grappling game and pin Chiasson to the mat? Her 88% takedown defense means she rarely gets taken down herself, but can she do the opposite?
- Will Chiasson use her length and striking to keep Vieira at distance? The 5’11” fighter with a 72-inch reach lands nearly 1 more strike per minute than Vieira and absorbs far less damage.
Both women are well-rounded. If Vieira finds her rhythm in the clinch or gets top control, she could grind out a decision. If Chiasson keeps the fight standing, her precision and reach could lead to another stoppage.
🎯 Prop Bets to Watch
| Bet | Odds (Est.) |
| Over 2.5 Rounds | -190 |
| Fight Goes the Distance | -160 |
| Chiasson via Decision | +200 |
| Vieira via Submission | +350 |
🔮 Oddsmakers expect a technical chess match and lean toward a full 3 rounds.
💰 ClutchBuzz Same Fight Parlay
| Leg | Pick |
| ✅ Over 2.5 Rounds | -190 |
| ✅ Fight Goes to Decision | -160 |
| ✅ Chiasson to Win | -115 |
💵 Parlay Payout (Est.): +240
🧠 Final Ketlen Vieira vs. Macy Chiasson Prediction
🎯 Prediction: Macy Chiasson via Split Decision
We’re in for a coin-flip fight between two veteran contenders. Vieira has the edge in grappling and top control, but Chiasson’s size, activity, and striking metrics give her the nod in a distance fight.
Chiasson should be able to fend off takedowns and keep this one standing. Her 3-inch height and 4-inch reach advantages will be key. Expect a competitive three-round war with Chiasson landing the cleaner shots in a razor-close win 🧠🥊
👉 Best Bet: Over 2.5 Rounds (-190)
