Compare Casey O'Neill vs Maycee Barber — UFC matchup breakdown
Tale of the Tape
The biometric deltas where one side genuinely has an edge.
Activity & layoff
The recency dimension Tale of the Tape doesn't carry. How active each fighter has been, and how that compares to active peers in their division.
Division percentiles below rank both fighters against the Flyweight roster (206 fighters). Casey O'Neill fights at Flyweight; Maycee Barber at Women's Flyweight — Maycee Barber’s percentiles are measured against a division they don’t compete in, so read them with that in mind.
Recent form
Last five pro bouts (non-UFC fights dashed + tagged), current trajectory, and the level of opposition going into this matchup.
Common opponents
The single UFC opponent both fighters have faced. Reads as a directional signal, not a verdict.
Schedule Score
Who they've faced × what they've done. Composite + components compared head-to-head, percentile-ranked against every UFC fighter w/ ≥3 resolved bouts.
Per-tier records + bout-by-bout
| Tier | Casey O'Neill | Maycee Barber |
|---|---|---|
| Champion | — | 0-2 |
| Top-5 | 1-1 | 3-1 |
| Top-15 | 3-1 | 6-0 |
| Cross-div ranked | 1-0 | — |
| Unproven | 1-0 | 1-0 |
- W vs Gabriella Fernandes#1462Mar 28, 2026 · Top-15
- W vs Luana Santos36Aug 17, 2024 · Cross-div ranked
- L vs Ariane da Silva52Dec 16, 2023 · Top-15
- L vs Jennifer Maia#979Mar 18, 2023 · Top-5
- W vs Roxanne Modafferi#1277Feb 12, 2022 · Top-5
- W vs Antonina Shevchenko#1564Oct 2, 2021 · Top-15
- W vs Lara Procopio8Jun 19, 2021 · Unproven
- W vs Shana Dobson#1565Feb 20, 2021 · Top-15
- L vs Alexa Grasso#396Mar 28, 2026 · Champion
- W vs Karine Silva#970Dec 6, 2025 · Top-15
- W vs Katlyn Cerminara#481Mar 9, 2024 · Top-5
- W vs Amanda Ribas#971Jun 24, 2023 · Top-15
- W vs Andrea Lee#1073Mar 25, 2023 · Top-15
- W vs Jessica Eye#1082Jul 2, 2022 · Top-5
- W vs Montana De La Rosa#1572Apr 23, 2022 · Top-5
- W vs Miranda Maverick#1467Jul 24, 2021 · Top-15
- L vs Alexa Grasso#1586Feb 13, 2021 · Champion
- L vs Roxanne Modafferi#780Jan 18, 2020 · Top-5
- W vs Gillian Robertson#1564Oct 18, 2019 · Top-15
- W vs JJ Aldrich46Mar 23, 2019 · Top-15
- W vs Hannah Cifers8Nov 10, 2018 · Unproven
All figures are 0–100 ratings (shown as %), not percentages of anything literal. Schedule strength = the average quality of every UFC opponent faced (win or lose). Win quality = the average quality of the opponents actually beaten. The composite Schedule Score combines schedule strength (65%) with win quality (35%). Per-bout opponent quality is scored on rank-at-time-of-fight (champion 100, ranks 1–5 = 90→78, ranks 6–15 = 75→60), with cross-division and P4P signals layered on, falling back to opponent UFC record-at-time for unranked opponents. For fighters with limited UFC experience the headline is held toward a rookie baseline, so debut / low-sample fighters read lower than established names. UFC ranking data is sparse before December 2018, so legacy-era fighters score from record-at-time when ranks are missing.
Career splits
Striking matchup
Each fighter's offense mapped against the other's defense — where one attacks meets where the other gets hit, across head, body, and leg. Per 15 minutes of UFC fight time.
Evenly matched striking — no clear edge either way.
Where O'Neill attacks (green = high volume) vs where Barber gets hit (red = vulnerable) — O'Neill’s green zones meeting Barber’s red zones are the openings.
- Head77%99th519
- Body14%79th94
- Leg9%62nd64
Color = division rank · green elite → red low · % = share of strikes
- Head55%67th224
- Body27%47th109
- Leg18%54th71
Color = division rank · green elite → red low · % = share absorbed · partly opponent-dependent
- Standing81%550
- Clinch5%31
- Ground14%96
- Standing69%280
- Clinch26%107
- Ground4%17
Each lane: the attacker’s strike rate (offense) vs the other’s rate absorbed (defense), graded on the division. The bar leans toward whoever wins the exchange — longer + greener = a bigger, higher-quality edge.
Full breakdown — all zones, both views
| Zone | Fighter | Landed / 15 | Accuracy | Absorbed / 15 | Career landed |
|---|---|---|---|---|---|
| Head | Casey O'Neill | elite — top of division69.9 | 47% | bottom of the division52.3 | 519 |
| Head | Maycee Barber | top 17% of division42.5 | 45% | above division average25.3 | 460 |
| Body | Casey O'Neill | top 21% of division14.4 | 78% | well below average14.1 | 94 |
| Body | Maycee Barber | above division average11.2 | 73% | around division average11.1 | 113 |
| Leg | Casey O'Neill | above division average10.1 | 94% | above division average6.8 | 64 |
| Leg | Maycee Barber | around division average6.6 | 87% | around division average7.4 | 62 |
Per-15-minute rates are sourced from UFCStats fight totals across each fighter’s UFC career. Division percentile is computed against every UFC fighter who has competed in this weight class with at least two recorded bouts. Lower “absorbed” values are better — the percentile is inverted so “top of division” always means better outcome.
Grappling matchup
Takedowns, submission threat, and control. Per 15 minutes of UFC fight time, with takedown defense as a percentage of opponent attempts stopped.
Each metric graded on the division — the bar leans toward whoever wins that part of the grappling exchange (longer + greener = a bigger edge).
Evenly matched grappling — no clear edge either way.
Full breakdown — career grappling totals
| Metric | Casey O'Neill | Maycee Barber |
|---|---|---|
| Takedowns landed / 15career takedowns | 1.48 | 1.515 |
| Takedown accuracycareer landed / attempted | 35%8 / 23 | 47%15 / 32 |
| Takedown defensecareer stopped / faced | 70%14 / 20 | 48%13 / 27 |
| Submission attempts / 15career attempts | 0.74 | 0.11 |
| Control time / 15 (min)career total | 3.8 min21:30 | 3.4 min33:58 |
| Time controlled by opponent / 15 (min)career total | 1.8 min10:03 | 4.7 min47:04 |
All rates computed from UFCStats fight totals across each fighter’s UFC career. Takedown defense = opponent attempts stopped ÷ opponent total attempts. Control time figures are minutes the fighter spent in a dominant position per 15 minutes of fight time. Accuracy under 8 career attempts is shown raw and ungraded — too small a sample to rate against the division.
Finishing & durability
How often each fighter ends fights early — and how often they get put away. Outcomes view, not per-minute output.
When their fights end
every pro finish on the fight clockFinish & durability rates
Full professional career
Full method breakdown
| Outcome | Casey O'Neill | Maycee Barber |
|---|---|---|
| Wins | ||
| by KO / TKO | 4(36%) | 6(40%) |
| by submission | 2(18%) | 2(13%) |
| by decision | 5(45%) | 7(47%) |
| Losses | ||
| by KO / TKO | 0(0%) | 1(33%) |
| by submission | 1(50%) | 0(0%) |
| by decision | 1(50%) | 2(67%) |
Full professional career method splits, graded against the full-pro division distribution. Career KO losses are the total — clean knockouts and cut/injury stoppages can’t be separated outside the UFC corpus. Finish-time pace is UFC-only.
KO history
UFC fights only — knockout power and chin durability, head-to-head, then when the last finish landed, and on whom.
- Last time KO'dNever finished by strikes in the UFC
- Last time submittedvs Ariane da Silva2y 6mo agoUFC 296: Edwards vs. Covington · Dec 16, 2023 · R2 · 1:18
- Last time KO'dvs Alexa Grasso2 months agoUFC Fight Night: Adesanya vs. Pyfer · Mar 28, 2026 · R1 · 2:42
- Last time submittedNever submitted in the UFC
Pace & fade
How each fighter's work rate holds up as a fight wears on — round-by-round output (striking, takedown attempts, and control time combined), and whether they fade. The fade % compares round-3 output to round 1 over bouts that reached the third round.
Both lean the same way, but O'Neill leans harder: O'Neill builds (+10% per round through round 3), Barber builds (+6% per round through round 3). Within fights that reached round 3, O'Neill lifts to 121% of round-1 output by round 3, Barber 144%.
Rounds backed by fewer than 2 bouts are drawn smaller and dimmed with an n= count — a deep round seen in one or two fights is a thin sample, not a settled rate. Per-round bout counts are in the breakdown below.
Full per-round breakdown — both fighters
What drives the pace · per round
The composite output line above blends these three inputs. Splitting them out shows whether a fighter’s work rate is built on striking volume, takedown pressure, or top control — and which input fades.
| Round | Fighter | Output / min | Sig landed / min | Sig absorbed / min | TD att / min | Control | Bouts |
|---|---|---|---|---|---|---|---|
| R1 | Casey O'Neill | 8.5 | 6.8 | 6.0 | 0.31 | 19% | 8 |
| R1 | Maycee Barber | 5.4 | 4.3 | 3.2 | 0.13 | 18% | 13 |
| R2 | Casey O'Neill | 10.8 | 8.7 | 4.7 | 0.27 | 32% | 7 |
| R2 | Maycee Barber | 6.0 | 4.3 | 2.4 | 0.21 | 26% | 11 |
| R3 | Casey O'Neill | 10.5 | 8.9 | 5.9 | 0.17 | 27% | 4 |
| R3 | Maycee Barber | 6.1 | 4.0 | 2.3 | 0.35 | 26% | 8 |
Output / minis the headline work rate — significant strikes landed, plus 3 per takedown attempt, plus one per 15 seconds of control — so a takedown-and-grind round isn’t scored as idle the way bare striking volume would. The remaining columns are its components. Per-round rates use UFCStats per-round data (available for ~95% of bouts since 2008). Each round’s rates are averaged only over bouts that reached that round, so the bout count shrinks as rounds deepen. The final round of a finished fight is pro-rated by its actual length — a 2:30 stoppage counts as 2.5 minutes, not five — so an early finish doesn’t distort the per-minute pace.