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FightIQ · The Lab · UFC debut

How do fighters do on their UFC debut?

Worse than a coin flip: fighters making their UFC debut against someone who had fought in the UFC before have won 41.8% of those fights, and it barely moves with how experienced the opponent was.

Headline: 41.8% of 1,661 fights, 95% range 39.5% to 44.2% · counted from 8,760 UFC fights with a winner, 11 March 1994 to 10 October 2026
How do fighters do on their UFC debut? How often the debutant won, row by rowEach row is a group of UFC fights; the dot is how often the debutant won, the whisker its 95% range, the dashed line 50%, a coin flip. Headline row: 41.8% of 1,661 fights. Rows under 30 fights are not drawn.20%30%40%50%60%70%50%, a coin flipThe rows the fight-page cards useOpponent had 1 to 3 UFC fights: 42.2% of 978 fights (95% range 39.2 to 45.3%)Opponent had 1 to 3 UFC fights978 fights42.2%Opponent had 4 to 9 UFC fights: 41.0% of 525 fights (95% range 36.8 to 45.2%)Opponent had 4 to 9 UFC fights525 fights41.0%Opponent had 10 or more UFC fights: 42.4% of 158 fights (95% range 35.0 to 50.2%)Opponent had 10 or more UFC fights158 fights42.4%By the opponent's UFC fights1 UFC fight: 42.7% of 457 fights (95% range 38.2 to 47.2%)1 UFC fight457 fights42.7%2 UFC fights: 41.4% of 290 fights (95% range 35.9 to 47.1%)2 UFC fights290 fights41.4%3 UFC fights: 42.4% of 231 fights (95% range 36.2 to 48.9%)3 UFC fights231 fights42.4%4 to 5: 40.4% of 275 fights (95% range 34.7 to 46.3%)4 to 5275 fights40.4%6 to 9: 41.6% of 250 fights (95% range 35.7 to 47.8%)6 to 9250 fights41.6%10 to 14: 36.3% of 91 fights (95% range 27.1 to 46.5%)10 to 1491 fights36.3%15 or more: 50.7% of 67 fights (95% range 39.1 to 62.3%)15 or more67 fights50.7%
How do fighters do on their UFC debut? How often the debutant won, row by rowEach row is a group of UFC fights; the dot is how often the debutant won, the whisker its 95% range, the dashed line 50%, a coin flip. Headline row: 41.8% of 1,661 fights. Rows under 30 fights are not drawn.20%30%40%50%60%70%50%, a coin flipThe rows the fight-page cards useOpponent had 1 to 3 UFC fights: 42.2% of 978 fights (95% range 39.2 to 45.3%)Opponent had 1 to 3 UFC fights978 fights42.2%Opponent had 4 to 9 UFC fights: 41.0% of 525 fights (95% range 36.8 to 45.2%)Opponent had 4 to 9 UFC fights525 fights41.0%Opponent had 10 or more UFC fights: 42.4% of 158 fights (95% range 35.0 to 50.2%)Opponent had 10 or more UFC fights158 fights42.4%By the opponent's UFC fights1 UFC fight: 42.7% of 457 fights (95% range 38.2 to 47.2%)1 UFC fight457 fights42.7%2 UFC fights: 41.4% of 290 fights (95% range 35.9 to 47.1%)2 UFC fights290 fights41.4%3 UFC fights: 42.4% of 231 fights (95% range 36.2 to 48.9%)3 UFC fights231 fights42.4%4 to 5: 40.4% of 275 fights (95% range 34.7 to 46.3%)4 to 5275 fights40.4%6 to 9: 41.6% of 250 fights (95% range 35.7 to 47.8%)6 to 9250 fights41.6%10 to 14: 36.3% of 91 fights (95% range 27.1 to 46.5%)10 to 1491 fights36.3%15 or more: 50.7% of 67 fights (95% range 39.1 to 62.3%)15 or more67 fights50.7%
How often the debutant won, with a 95% range on every row. filled: clear of the dashed linehollow: could be chanceRows resting on fewer than 30 fights are not drawn.

What this means for a fight

The first fight in the Octagon is a real hurdle. A debutant does not need to meet a veteran to be the underdog on the record: one previous UFC fight on the other side is already enough to tilt it.

Correlation is not causation. Debutants are often booked as the opponent, on short preparation, against someone the promotion already rates, so the gap is partly matchmaking rather than nerves.

The latest fights in the headline row

The most recent UFC fights counted in the headline row (any of these rows).

The numbers

The rows the fight-page cards use

GroupFightsWin rate95% range
Opponent had 1 to 3 UFC fights (headline)97842.2%39.2 to 45.3%
Opponent had 4 to 9 UFC fights (headline)52541.0%36.8 to 45.2%
Opponent had 10 or more UFC fights (headline)15842.4%35.0 to 50.2%

By the opponent's UFC fights

GroupFightsWin rate95% range
1 UFC fight45742.7%38.2 to 47.2%
2 UFC fights29041.4%35.9 to 47.1%
3 UFC fights23142.4%36.2 to 48.9%
4 to 527540.4%34.7 to 46.3%
6 to 925041.6%35.7 to 47.8%
10 to 149136.3%27.1 to 46.5%
15 or more6750.7%39.1 to 62.3%

Has it held over time? (every row together)

YearsFightsWin rate95% range
1994 to 200517135.1%28.3 to 42.5%
2006 to 201558238.7%34.8 to 42.7%
2016 to today90845.2%41.9 to 48.4%

How we counted

Every UFC bout on the official statistical record from 11 March 1994 to 10 October 2026 that had a winner. Draws, no-contests and overturned results are left out of every count. A debut is a fighter's first bout on the UFC record. Only debuts against an opponent with at least one previous UFC fight are counted (two debutants meeting is an even fight by construction).

Anything built from a fighter's history (debuts, runs, breaks, previous meetings) only looks at UFC bouts dated before the fight, and leaves out the few names the register holds for two different fighters. A row needs at least 30 fights to be drawn or quoted; smaller rows are listed as too few to call. The 95% range is a Wilson interval: where the true rate probably sits, given how many fights there are.