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John Riordan is an American professional poker player who has been a quiet but deadly force in the game for over fifteen years. Originally from Florida, Riordan made history as a teenager by becoming the youngest winner of a World Series of Poker Circuit Main Event. Since then, he has successfully transitioned from an online prodigy to a high-stakes master, recently cementing his status as one of the world’s best Pot Limit Omaha players by capturing a Super High Roller Bowl title.
Career Earnings & Biggest Results
With total live tournament earnings of over $6.6 million (according to The Hendon Mob), Riordan is a major player in the high-stakes community. His most significant career achievement came in October 2025 at the Super High Roller Bowl $100,000 Pot Limit Omaha, where he defeated a field of elite specialists to win a career-best $1,250,000.
Riordan’s legacy began in 2011 when, at just 19 years old, he won the WSOP Circuit Palm Beach Kennel Club Main Event for $210,180. He has since added two WSOP online bracelets to his collection, both won during a single series in 2023. His 2026 campaign is already off to a strong start, with multiple deep runs in the Wynn Millions and the PokerGO Cup, including a runner-up finish in a $10,500 High Roller for $60,000.
Biography & Poker Background
Based in Palm Beach Gardens, Florida, Riordan’s journey into poker started early. He began playing “play money” games online at the age of 13 and moved to real money as soon as he turned 18. Because Florida law allowed 18-year-olds to play in local card rooms at the time, he was able to win a major WSOP Circuit title before he was even old enough to enter a casino in Las Vegas. Often known by his online handle “mcallan25,” he spent years grinding the highest stakes of Pot Limit Omaha online. This digital training ground prepared him for a seamless transition into the live Super High Roller circuit, where he now regularly competes against the best players in the world in Las Vegas and beyond.
Play Style & Strategy
Riordan is widely considered a Pot Limit Omaha (PLO) specialist, a game that requires a deep understanding of equities and extreme mental toughness. While many players find the swings of PLO stressful, Riordan is known for his unshakeable focus and his ability to stay calm during massive pots. His strategy is built on a foundation of high-level mathematics, but he also possesses a great “feel” for the live game, which he developed during his years in the Florida cash game scene. Whether he is playing a standard No Limit Hold’em tournament or a “Big Bet Mix,” Riordan is known for being a disciplined and patient competitor who waits for the perfect moment to apply pressure on his opponents.
Social Media & Online Presence
Want to follow John Riordan as he continues his 2026 run in the PokerGO Tour and major Las Vegas series? You can track his latest results and rankings here:
