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Julianna Pena vs Kayla Harrison

Women's Bantamweight · Main card · UFC 316: Dvalishvili vs. O'Malley 2

FINAL: Kayla Harrison by SUB Kimura
Julianna Pena
Julianna Pena
Age 35 · Elo 1570
WLWWL
420 days since last fight
vs
Kayla Harrison
Kayla Harrison
Age 34 · Elo 1577*
WW
420 days since last fight

Who wins, by source

Julianna PenaKayla Harrison
Claude Claude: Julianna Pena 32% Claude: Kayla Harrison 68% 32% 68% GPT GPT: Julianna Pena 25% GPT: Kayla Harrison 75% 25% 75% Elo Elo: Julianna Pena 49% Elo: Kayla Harrison 51% 49% 51%

Each row splits one source's view of the fight. The dashed line is even odds. Where the models sit further from the market, they are claiming an edge.

Tale of the tape

Julianna PenaKayla Harrison
Strikes landed / min Julianna Pena Strikes landed / min: 3.25 3.25 Kayla Harrison Strikes landed / min: 4.87 4.87 Strikes absorbed / min Julianna Pena Strikes absorbed / min: 2.53 2.53 Kayla Harrison Strikes absorbed / min: 1.19 1.19 Striking accuracy Julianna Pena Striking accuracy: 44% 44% Kayla Harrison Striking accuracy: 64% 64% Striking defense Julianna Pena Striking defense: 57% 57% Kayla Harrison Striking defense: 64% 64% Takedowns / 15 min Julianna Pena Takedowns / 15 min: 1.81 1.81 Kayla Harrison Takedowns / 15 min: 2.75 2.75 Takedown defense Julianna Pena Takedown defense: 23% 23% Kayla Harrison Takedown defense: 100% 100% Sub attempts / 15 min Julianna Pena Sub attempts / 15 min: 0.8 0.8 Kayla Harrison Sub attempts / 15 min: 0.7 0.7

Career UFC averages. Bars are scaled within each row, so compare left against right, not row against row. The stronger side is highlighted, and for strikes absorbed the lower number is the better one.

How it ends

KO/TKOSubmissionDecision
Claude Claude: KO/TKO 20% 20% Claude: Submission 25% 25% Claude: Decision 55% 55%GPT GPT: KO/TKO 30% 30% GPT: Submission 20% 20% GPT: Decision 50% 50%

Each model's split across the ways this fight can finish, out of 100.

The analysis

Claude
Kayla Harrison by Decision, 68% confidence

Harrison brings Olympic-level grappling credentials and superior physical attributes to this matchup. Her striking differential (+3.68 vs Pena's +0.72) and defensive metrics (64% vs 57%) give her a clear advantage on the feet. While Pena has shown tremendous heart and durability, Harrison's 100% TDD will likely prevent Pena from implementing her preferred top position game. Harrison's striking volume (4.87 SLPM vs Pena's 3.25) and significantly better striking defense will allow her to control distance and pace. Pena's poor 23% TDD will be exploited by Harrison's Olympic Judo background, allowing Harrison to dictate where the fight takes place. Harrison's recent form shows consistent improvement in her striking game to complement her world-class grappling.

GPT
Kayla Harrison by Decision, 75% confidence

Harrison's superior striking accuracy and volume, combined with her perfect takedown defense, should allow her to control the fight and outscore Pena.