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Danny O'Sullivan

Sports betting analyst

Danny O'Sullivan

Based in Manchester, UKIn the field since 2015Author & fact-checker at Archenfield

About Danny O'Sullivan

Danny O’Sullivan reviews the sportsbook side of the site. He spent five years on a trading desk pricing football and racing before moving to writing, which is why his reviews start with the odds and the margin rather than the size of the sign-up offer.

For every book on the site he places real bets from his own account, records the price he took against the closing line, and checks the things a punter actually leans on mid-match: whether cash-out is offered and honoured, how quickly in-play markets settle, and how deep the football and racing coverage really goes below the Premier League and the big meetings.

He is based in Manchester and reads every offer in full before it goes near a ranking — the rollover on a free bet, the minimum odds, the fine print on acca insurance — because that is where a “bet £10 get £30” headline either holds up or falls apart.

How Danny Tests

  1. Real bets, prices loggedEvery book is funded from his own account and he records the odds he took against the closing line. A book that consistently prices worse than the close is marked down whatever the welcome offer says.
  2. The markets punters actually useHe checks football depth across all five English tiers, the racing meetings covered, and whether in-play and cash-out work under load — not just the shop-window headline markets.
  3. Offer terms read in fullFree-bet rollover, minimum odds, acca-insurance conditions and stake returns are read line by line, because that is where the real value of an offer is decided.
  4. No invented ratingsScores come from bet history. Where a book hides its limits or won’t confirm a cash-out policy, the page says so instead of guessing.

Areas of Expertise

Odds & marginsIn-play & cash-outFootball & horse-racing marketsFree-bet & acca termsOffshore sportsbook licensingBet-builder value

Articles by Danny

Best Non-GamStop Betting Sites UKSportsbooks not on GamStop, judged on offers, in-play and cash-out.Non-GamStop BookiesA bookmaker-by-bookmaker comparison on the markets that matter.Football Betting Not on GamStopLeague depth, market types, accas and in-play football, in one place.

Editorial standards

Every ranking on Archenfield is written and fact-checked against first-hand testing and reviewed on a fixed schedule. Operators cannot pay for a higher position; the order is set by testing alone. Spotted something out of date? Tell us and Danny will re-check it.