JJ Aldrich
14-7-0
VS
2026-09-12
UFC Fight Night: Elliott vs. Chairez
Women's Flyweight
Regina Malpica Rivera
"Kill Bill"
5-0-0
XGBOOST PREDICTION
Regina Malpica Rivera 'Kill Bill'
51.2% CONFIDENCE
ACTUAL RESULT — MODEL WAS CORRECT
Regina Malpica Rivera 'Kill Bill' won
Decision · Round 3 · 5:00
How It Ends
70%
Decision
17%
KO / TKO
12%
Submission
Decision70.4%
KO / TKO17.3%
Submission12.3%
If it's a finish, which round
Round 138.5%
Round 237.0%
Round 3+24.5%
A separate model trained only on how fights end (not who wins) — 30% estimated chance this fight is finished rather than going to a decision.
Why XGBoost leans this way
JJ Aldrich
Regina Malpica Rivera
Age edge (significant gap)
Matchup
15%
Strike rate delta r1 to r3
Regina Malpica Rivera
8%
Experience edge (total fights)
Matchup
7%
Strike rate delta r1 to r3
JJ Aldrich
7%
Defensive skill edge
Matchup
6%
Age
Regina Malpica Rivera
6%
Age
JJ Aldrich
5%
Head absorption rate
JJ Aldrich
4%
Net striking dominance
Matchup
4%
Strikes absorbed/min
JJ Aldrich
3%
Distance strike defense
JJ Aldrich
3%
Strikes absorbed/min
Regina Malpica Rivera
3%
Total career fights (incl. non-UFC)
Regina Malpica Rivera
2%
Body strikes absorbed per min
Regina Malpica Rivera
2%
← pushes toward JJ Aldrich pushes toward Regina Malpica Rivera →
Bars show each factor's SHAP contribution to this specific prediction — how much it pushed the win probability toward one fighter, given everything else the model knows. Percentages are each factor's share of the total push across the top 30 factors.

JJ Aldrich

Win Streak
N/A
Finish Rate
N/A%
Avg Duration
N/Am
Last 5 fights (most recent first)
L DEC
W DEC
W DEC
L DEC
W DEC
Height: 165 cm
Weight: 125 lbs
Reach: 170 cm
Stance: Southpaw

Regina Malpica Rivera

Win Streak
N/A
Finish Rate
N/A%
Avg Duration
N/Am
Last 5 fights (most recent first)
W DEC
W DEC
Height: N/A cm
Weight: 135 lbs
Reach: N/A cm
Stance: N/A