LAS VEGAS » A 23-year-old online poker star has beaten the reigning World Series of Poker Player of the Year in a $1 million buy-in charity poker tournament.

Massachusetts resident Daniel Colman won more than $15 million Tuesday in the Big One for One Drop poker event in Las Vegas. It’s the second-largest payout in the series’ history, behind only the $18 million paid out in the inaugural Big One event in 2012.

The tournament raised $4.6 million for the One Drop Foundation, a nonprofit created by Cirque du Soleil founder Guy Laliberte and dedicated to providing clean water to developing countries.

The event attracts businessmen and poker professionals alike.

Famed poker player and Canada native Daniel Negreanu finished in second place and took home more than $8 million.