Sean Zerillo is a senior betting analyst at Action Network who produces MLB and MMA projections using proprietary models. He joined in 2019 after working in law, baseball video scouting and financial regulatory compliance.
Scorecard
Called 7 of 14 resolved picks — every call traced to its source, no bare percentage. How Track Record works.
- Winner Accuracy 50.0% 7 7
- Method AccuracyNamed methods — none on a correct call yet
- Round AccuracyCalls the winner, not the round
- Underdog Accuracy 14.3% 1 6
Hit Miss
The running record
Every figure below is cumulative — computed over all resolved calls up to and including each card, never one card on its own. A cumulative rate settles as the denominator grows: read where a line sits alongside its denominator. Winner covers every resolved call; method, round and underdog each have a different and much smaller base, printed beside each one.
Hit Miss
7 of 14 — 50% now, from 33% at their first scored card.
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Underdog
14% 1 of 7 priced underdog calls
The opening point is drawn dashed and hollow: below 5 scored calls this rate is not yet a reliable figure.
Method — No method calls scored yetRound — No round calls
Card by card
Newest card first. One mark per resolved call, hits above the line and misses below. Every call is listed in Call History, below.
- Allen vs. Duncan 1 hit · 1 miss
- UFC 328 4 hit · 2 miss
- UFC 327 2 hit · 4 miss
Call History
Every logged call, grouped by event, scored on Winner, Method, and Round — nothing about a result ever sits behind a click.
underdog pick favourite pick — shown only for picks with a known pre-fight price. The percentage is the chance the market gave the fighter this analyst picked. Open a row for the price’s source and the credit it earned.
Allen vs. Duncan
Event scorecard
- Winner Accuracy 50.0% 1 1
- Method AccuracyNamed methods — none on a correct call yet
- Round AccuracyCalls the winner, not the round
- Underdog Accuracy 0.0% 1
| Fight | Pick | Actual | Winner | Method | Round |
|---|---|---|---|---|---|
| Favourite call, market price 67.4%. Godinez · to win | Godinez · Dec R3 | Hit | Not called | Not called | |
Sean Zerillo selects Loopy Godinez; the article uses the variant “Lupita Godinez.” Favourite call. The market gave this fighter 67.4% before the fight, from the pre-event sportsbook consensus frozen before the fight. Favourite calls earn no underdog credit. | |||||
| Underdog call, market price 48.9%. Duncan · Dec | Allen · Sub R5 | Miss | Not applicable — the winner call missed | Not applicable — the winner call missed | |
Sean Zerillo backs Christian Leroy Duncan on the moneyline and separately projects Duncan to win by decision. “I project a correlated edge on Duncan to win by decision” Underdog call. The market gave this fighter 48.9% before the fight, from the pre-event sportsbook consensus frozen before the fight. | |||||
UFC 328
Event scorecard
- Winner Accuracy 66.7% 4 2
- Method AccuracyCalls the winner, not the method
- Round AccuracyCalls the winner, not the round
- Underdog Accuracy 33.3% 1 2
| Fight | Pick | Actual | Winner | Method | Round |
|---|---|---|---|---|---|
| Favourite call, market price 60.5%. Ochoa · to win | Ochoa · Dec R3 | Hit | Not called | Not called | |
Sean Zerillo's Action Network UFC 328 moneyline picks back Jose Ochoa. Favourite call. The market gave this fighter 60.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. Favourite calls earn no underdog credit. | |||||
| Favourite call, market price 59.5%. Sabatini · to win | Sabatini · Dec R3 | Hit | Not called | Not called | |
Sean Zerillo's Action Network UFC 328 moneyline picks back Pat Sabatini. Favourite call. The market gave this fighter 59.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. Favourite calls earn no underdog credit. | |||||
| Underdog call, market price 37.5%. Kopylov · to win | Kopylov · Dec R3 | Hit | Not called | Not called | |
Sean Zerillo's Action Network UFC 328 moneyline picks back Roman Kopylov. Underdog call. The market gave this fighter 37.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. | |||||
| Underdog call, market price 41.5%. Rębecki · to win | Dawson · Sub R3 | Miss | Not applicable — the winner call missed | Not applicable — the winner call missed | |
Sean Zerillo's Action Network UFC 328 moneyline picks back Mateusz Rebecki. Underdog call. The market gave this fighter 41.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. | |||||
| Underdog call, market price 20.5%. Stephens · to win | Green · Sub R1 | Miss | Not applicable — the winner call missed | Not applicable — the winner call missed | |
Sean Zerillo's Action Network UFC 328 moneyline picks back Jeremy Stephens. Underdog call. The market gave this fighter 20.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. | |||||
| Favourite call, market price 56.5%. Volkov · to win | Volkov · Dec R3 | Hit | Not called | Not called | |
Sean Zerillo's Action Network UFC 328 moneyline picks back Alexander Volkov. Favourite call. The market gave this fighter 56.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. Favourite calls earn no underdog credit. | |||||
UFC 327
Event scorecard
- Winner Accuracy 33.3% 2 4
- Method AccuracyCalls the winner, not the method
- Round AccuracyCalls the winner, not the round
- Underdog Accuracy 0.0% 3
| Fight | Pick | Actual | Winner | Method | Round |
|---|---|---|---|---|---|
| Underdog call, market price 37.5%. Prado · to win | Radtke · Dec R3 | Miss | Not applicable — the winner call missed | Not applicable — the winner call missed | |
Sean Zerillo's Action Network UFC 327 moneyline picks back Francisco Prado. Underdog call. The market gave this fighter 37.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. | |||||
| Padilla vs Mederos | Mederos · to win | Decision | Mederos | Not called | Not called |
| Underdog call, market price 41.5%. Godinez · to win | Suarez · Sub R2 | Miss | Not applicable — the winner call missed | Not applicable — the winner call missed | |
Sean Zerillo's Action Network UFC 327 moneyline picks back Loopy Godinez. Underdog call. The market gave this fighter 41.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. | |||||
| Underdog call, market price 47.0%. Landwehr · to win | Swanson · KO/TKO R1 | Miss | Not applicable — the winner call missed | Not applicable — the winner call missed | |
Sean Zerillo's Action Network UFC 327 moneyline picks back Cub Swanson. Underdog call. The market gave this fighter 47.0% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. | |||||
| Favourite call, market price 51.5%. Hokit · to win | Hokit · Dec R3 | Hit | Not called | Not called | |
Sean Zerillo's Action Network UFC 327 moneyline picks back Josh Hokit. Favourite call. The market gave this fighter 51.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. Favourite calls earn no underdog credit. | |||||
| Favourite call, market price 68.0%. Murzakanov · to win | Costa · KO/TKO R3 | Miss | Not applicable — the winner call missed | Not applicable — the winner call missed | |
Sean Zerillo's Action Network UFC 327 moneyline picks back Paulo Costa. Favourite call. The market gave this fighter 68.0% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. Favourite calls earn no underdog credit. | |||||
| Favourite call, market price 50.5%. Ulberg · to win | Ulberg · KO/TKO R1 | Hit | Not called | Not called | |
Sean Zerillo's Action Network UFC 327 moneyline picks back Carlos Ulberg. Favourite call. The market gave this fighter 50.5% before the fight, from a price reconstructed after the fact from Polymarket’s public trading history. Favourite calls earn no underdog credit. | |||||
Videos
No sourced clips are linked to this analyst's calls yet.