HonestElo
← heavyweight

Jairzinho Rozenstruik "Bigi Boy"

Active #16 heavyweight · age 38 · Orthodox · 6'4" 193 cm · 242 lb 110 kg · reach 78" 198 cm
At a glance
  • Earned a bonus in 2 of last 5 fights
  • 89% of wins by KO/TKO
  • 44% of wins finished in round 1
Elo rating
1553
Global Elo 1601 ±37
Rank
#16
top 37% of division
UFC record
9-6-0
KO 8 · Sub 0 · Dec 1
Streak
-1
Δ90d -3 · Δ1y -3
Last fight
Feb 1, 2025
Loss by Decision · R3
Career at a glance
Octagon time
2h 22m
Avg fight time
9:27
Bonuses
5
Fights per year
2.5
Since last fight
1y 5mo

Honest Elo history

15 fights · tap & drag
Feb 2, 2019 — W vs Junior Albini Δ+32Jun 22, 2019 — W vs Allen Crowder Δ+27Nov 2, 2019 — W vs Andrei Arlovski Δ+34Dec 7, 2019 — W vs Alistair Overeem Δ+34May 9, 2020 — L vs Francis Ngannou Δ-27Aug 15, 2020 — W vs Junior Dos Santos Δ+22Feb 27, 2021 — L vs Ciryl Gane Δ-16Jun 5, 2021 — W vs Augusto Sakai Δ+17Sep 25, 2021 — L vs Curtis Blaydes Δ-15Jun 4, 2022 — L vs Alexander Volkov Δ-18Dec 10, 2022 — W vs Chris Daukaus Δ+18May 13, 2023 — L vs Jailton Almeida Δ-18Mar 2, 2024 — W vs Shamil Gaziev Δ+16Aug 17, 2024 — W vs Tai Tuivasa Δ+13Feb 1, 2025 — L vs Sergei Pavlovich Δ-16 1450147515001525155015751600 202020212022202320242025 [{"i":0,"x":90,"y":343.4,"elo":1481,"date":"2019-02-02","opp":"Junior Albini","result":"W","delta":32},{"i":1,"x":136,"y":285.4,"elo":1508,"date":"2019-06-22","opp":"Allen Crowder","result":"W","delta":27},{"i":2,"x":179.7,"y":212,"elo":1543,"date":"2019-11-02","opp":"Andrei Arlovski","result":"W","delta":34},{"i":3,"x":191.2,"y":139.1,"elo":1577,"date":"2019-12-07","opp":"Alistair Overeem","result":"W","delta":34},{"i":4,"x":241.8,"y":197.5,"elo":1550,"date":"2020-05-09","opp":"Francis Ngannou","result":"L","delta":-27},{"i":5,"x":274,"y":151.7,"elo":1571,"date":"2020-08-15","opp":"Junior Dos Santos","result":"W","delta":22},{"i":6,"x":338.4,"y":185.4,"elo":1555,"date":"2021-02-27","opp":"Ciryl Gane","result":"L","delta":-16},{"i":7,"x":370.6,"y":148.9,"elo":1572,"date":"2021-06-05","opp":"Augusto Sakai","result":"W","delta":17},{"i":8,"x":407.4,"y":180.2,"elo":1558,"date":"2021-09-25","opp":"Curtis Blaydes","result":"L","delta":-15},{"i":9,"x":490.3,"y":218.6,"elo":1540,"date":"2022-06-04","opp":"Alexander Volkov","result":"L","delta":-18},{"i":10,"x":552.4,"y":180,"elo":1558,"date":"2022-12-10","opp":"Chris Daukaus","result":"W","delta":18},{"i":11,"x":603,"y":217.8,"elo":1540,"date":"2023-05-13","opp":"Jailton Almeida","result":"L","delta":-18},{"i":12,"x":699.6,"y":183.9,"elo":1556,"date":"2024-03-02","opp":"Shamil Gaziev","result":"W","delta":16},{"i":13,"x":754.8,"y":155.5,"elo":1569,"date":"2024-08-17","opp":"Tai Tuivasa","result":"W","delta":13},{"i":14,"x":810,"y":189.6,"elo":1553,"date":"2025-02-01","opp":"Sergei Pavlovich","result":"L","delta":-16}]

Last fights

Elo-based expectation · not betting advice
Date Opponent Result Δ Elo
Feb 1, 2025 Sergei Pavlovich L -16
Aug 17, 2024 Tai Tuivasa W +13
Mar 2, 2024 Shamil Gaziev W +16
May 13, 2023 Jailton Almeida L -18
Dec 10, 2022 Chris Daukaus W +18

Performance

SLpM Significant Strikes Landed per Minute. Higher = busier striker.
Strikes Landed
L1L3L5
Str Acc Striking accuracy: significant strikes landed / attempted. Higher = more efficient striker.
Strike Accuracy
L1L3L5
SApM Significant Strikes Absorbed per Minute. How often opponents land on this fighter. Lower is better.
Strikes Absorbed
L1L3L5
Str Def Share of opponent’s significant strike attempts that miss or are blocked. Higher is better.
Striking Defense
L1L3L5
TD / 15 min Takedowns landed per 15 minutes (one full 3-round fight). Measures wrestling output.
Takedowns
L1L3L5
TD Acc Takedowns landed / attempted. Higher = cleaner entries.
Takedown Accuracy
L1L3L5
TD Def Share of opponent takedown attempts stuffed. Higher = harder to put on the mat.
Takedown Defense
L1L3L5
Sub / 15 min Submission attempts per 15 minutes. Counts attempts, not just finishes — a proxy for grappling aggression.
Submission Attempts
L1L3L5
Ctrl / 15 min Control time in seconds per 15 minutes. Time in dominant grappling positions. 240 = 4 min, the realistic high-end across divisions.
Control Time (sec)
L1L3L5
KD / 15 min Knockdowns landed per 15 minutes. Counts every flash KD even if the fight continued — measures stopping power across all rounds, not just finishes.
Knockdowns
L1L3L5
Above division avg (intensity ∝ how far)
Near avg (±10%)
Below division avg

Finishes

How wins come Finish rate = (KO + Submission wins) / total UFC wins. Measures how often this fighter closes the show before the scorecards.
89%
8 / 9
Finish rate
KO
8
89% of wins
SUB
0
0% of wins
DEC
1
11% of wins
KO: 8 (89%) 8 Sub: 0 (0%) Dec: 1 (11%) 1
Finishes by round
8 total
R1
4 50%
R2
2 25%
R3
R4
1 13%
R5
1 13%

Striking profile

Where significant strikes land — by target zone and by position. 493 landed total · career

Targets head · body · leg
60% Head
  • Head 60%
  • Body 15%
  • Leg 25%
Positions distance · clinch · ground
87% Distance
  • Distance 87%
  • Clinch 8%
  • Ground 5%

Durability

How they're beaten How fights end AGAINST this fighter. Finished-against rate = (times KO'd + submitted) / total UFC losses. A low rate means they rarely get stopped.
50%
of losses by finish
3 of 6 · usually R1
2 KO/TKO 1 Sub 3 Dec

Strength of schedule in UFC

Avg opp Elo (last 5) Average Elo rating of the last 5 opponents this fighter faced. A proxy for schedule difficulty — 1700+ is elite-level competition, 1500 is a UFC average opponent.
1583
UFC level
Quality wins (1600+) Wins over opponents rated 1600+ Elo at the time of the fight — clearly above the ~1500 UFC average, contender tier. A count of genuine quality results, not record-padding.
2
of 9 UFC wins
Toughest win The highest-rated opponent this fighter has a win over, by that opponent's Elo at fight time.
Junior Dos Santos
Elo 1660 at fight time
Expected wins How many wins an average fighter would be expected to have against this exact schedule, based on pre-fight Elo win probabilities. The line below shows whether this fighter is over- or under-performing their matchups.
7.5
+1.5 wins above what this schedule implies
Opponent Elo over career · 15 UFC fights, oldest → newest
1485
1620
Notable wins
Junior Dos Santos 1660 Alistair Overeem 1605

Top heavyweight

See full rankings →
Ciryl Gane IC
#1 · Elo 1691
Alexander Volkov
#2 · Elo 1656
Alex Pereira
#3 · Elo 1655
Tom Aspinall C
#4 · Elo 1654
Sergei Pavlovich
#5 · Elo 1619
Source Raw fight data and per-bout statistics come from Jairzinho Rozenstruik on UFCStats →. Elo rating, uncertainty bands, and division-relative analytics computed by HonestElo — not affiliated with or endorsed by the Ultimate Fighting Championship.