What the Odds Say
Katlyn Chookagian enters this women's flyweight matchup as a clear consensus favorite. The moneyline tells the story quickly: Chookagian is priced between -250 and -323 depending on the book, while Mackenzie Stiller checks in as the underdog at +200 to +233. At the consensus price around -270, Chookagian's implied win probability sits at roughly 73%. Stiller, near +215 to +220, carries an implied probability in the 31-33% range.
This is a meaningful gap, but not so wide that Stiller is being written off. A dog priced in the +200s in MMA is a live underdog, and flyweight bouts can end quickly and unexpectedly. The market says Chookagian wins this fight more often than not, but Stiller has a real path to victory baked into these numbers.
Use our Odds Converter to translate any of these American odds into implied probabilities or decimal format.
Katlyn Chookagian: Favorite Breakdown
Chookagian is one of the more recognizable names in the UFC's women's flyweight division. She has been in the mix at 125 pounds for years, earning a title shot and building a resume of high-profile fights. That experience at the top level is a significant reason oddsmakers are pricing her as a heavy favorite here.
The range of prices on Chookagian is worth noting. Novig has her at -323, noticeably steeper than Betway at -250 or Kalshi at -256. If you are backing the favorite, shopping for the best number is essential: -250 at Betway or Coolbet is meaningfully better than -323 at Novig. The difference in implied probability between those two prices is nearly six percentage points, which is not trivial when you are looking for edges.
Mackenzie Stiller: Underdog Breakdown
Stiller's price ranges from +200 at Betway to +233 at Kalshi. BetOnline.ag is offering +230 and Pinnacle has her at +226, making those among the better numbers for anyone considering a Stiller play.
In MMA, backing a +215 underdog carries obvious risk but real upside. A $100 bet at +220 returns $220 in profit. The market says she wins roughly one in three times, and in a sport where submissions and knockouts can happen to anyone, that is not a number to dismiss.
A draw is available at 1xBet at +3200. Draws are rare in MMA, and that line is an exotic play rather than a meaningful market signal.
Totals: Meaningful Disagreement Across Books
The totals market shows notable disagreement. The line is set at 2.5 rounds, with books split on where the over should be priced.
Bovada and DraftKings both price the over at -345, heavily favoring a fight that reaches the third round or goes to decision. But 1xBet has the over at -250 with the under at +180, and BetOnline.ag and BetUS have the over at -323 with the under at +263 and +264, respectively.
The best number for an over play is -250 at 1xBet. For the under, Bovada at +250 or BetOnline.ag at +263 offer the most value. When lines diverge this much, there is often an opportunity to compare books or explore a middle.
Our Middle Calculator can help you map out whether any combination of totals lines presents a middling opportunity across these books.
Betting Factors to Watch
Line movement. Chookagian's price could tighten further if sharp money continues to come in on her side. Any significant Stiller action could push her price lower and Chookagian's higher.
Finish history. Chookagian has gone to decision frequently throughout her career. Bettors who expect this fight to go the distance should be on the over. If you think Stiller has a real shot, her most likely path involves an early finish, pointing toward the under.
Book selection. The gap between -250 and -323 on the favorite, and +200 and +233 on the underdog, is wide enough that line shopping is not optional here. Check the Line Whale UFC odds page to compare the full market before placing a bet on this fight.
This bout is scheduled for Saturday, October 17, with a start time of 2:00 PM PDT. There is still time to monitor how the market shifts before fight day, and tracking line movement over the coming days could reveal where the sharpest money is landing.