Predictors of two consecutive knockout losses in ultimate fighting championship athletes

The current study sought to: (1) characterize the demographic and fight specific details of Ultimate Fighting Championship (UFC) athletes who experienced two consecutive knockout (KO) or technical knockout (TKO) losses, and (2) identify predictors associated with two consecutive KO or TKO losses using publicly available data.

A retrospective cohort study examined UFC fighters who sustained at least one KO/TKO loss between 01/2015 and 12/2023 (with at least one subsequent fight) using publicly available fight records and third-party sources. Fighters were binarized into: (1) One Knockout group or (2) Two Consecutive Knockouts group. Demographics and fight specific details from the initial KO/TKO loss were compared using t-tests and chi-squared tests. A multivariable logistic regression identified predictors of two consecutive KO/TKO losses using variables including age, sex, prior knockout history, weight, total head strikes absorbed, and knockout type.

Among 705 UFC athletes who sustained a knockout (age: mean = 31.1; 89.9% male), 77.3% sustained a single KO/TKO loss and 22.7% sustained two consecutive losses. Fighters with two consecutive knockouts were older (31.8 ± 3.9 vs. 31.0 ± 4.0; t = -2.288, p = .022) and more likely to be male (94.4% vs. 88.6%; χ² = 4.5, p = .034). Additonally, they fought at a heavier weight class (175.9 ± 41.8 lbs vs. 168.8 ± 39.4 lbs; t = -1.991, p = .047). In the logistic regression, prior knockout history was the only independent predictor (OR = 1.13, p = .019, 95% CI = 1.020-1.246).

Among UFC athletes during a 9-year period, 23% sustained two knockout losses in a row. Associations with two consecutive knockouts were older age, male sex, heavier weight class, and prior KO history, with prior KO history emerging as the only independent predictor. Recognizing prior knockout exposure as a key risk factor may help coaches and sports medicine physicians identify fighters at greater vulnerability for subsequent knockouts. Identifying high-risk fighters through knockout history may inform return-to-competition and medical clearance decisions.