"Fair" is the model's no-vig price for that exact outcome; "book" is the best live sportsbook price for it (hover for the book). A green book price is longer than fair — value if you trust the model. Method prices update with each odds sync.
Median sportsbook implied win probability (vig included) at each odds snapshot since we started tracking this fight. A rising line = money and respect moving toward that fighter.
The model makes Perez a narrow 56% favorite. Perez is most dangerous early — 5 of 11 tracked wins ended in the first round. Perez's most likely path is by KO/TKO (42%), and the fight goes the distance 13% of the time — if it ends inside the distance, round 1 carries the most risk. The live danger for Perez: 70% of Paxton's wins come by knockout and 50% of Perez's losses have come the same way.
Model: recent-fight output & defense rates (ESPN box stats), career method splits, durability, layoffs, and physical edges through a bounded logistic; weights tuned by walk-forward backtest on 1,500+ UFC fights — 61% winner accuracy and 32% exact winner-plus-method on 204 held-out fights (vs 26% picking favorite-by-decision). Probabilities are discounted in boom-or-bust matchups (both fighters' bouts ending fast) and squeezed toward the betting market's implied odds where a line exists — divergence beyond 10 points counts half. Experimental — size responsibly.