Tiger Woods Costs FanDuel $2 Million

• Company claims 21 percent of future bets were on Tiger Woods

• Will also refund all entries to its $1 million tournament

• William Hill Sportsbook must pay one futures bettor shy of $1.2 million

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The popular US-based online sportsbook, FanDuel, will have to pay out some $2 million following Tiger Woods shock victory at this past weekend's Masters Tournament.

Some 21 percent of future bets were placed on Woods at around 18-1 odds.

The company also says it will refund all entries to its $1 million guaranteed Mega Eagle Tournament on the fanstasy side of its business.  Each entry cost $15 and Woods did not have to be in one's lineup for the refund to be made.

Elsewhere, one individual bet $85000 for Woods to win at 14-1 odds at William Hill in Nevada.  That company will not have to pay him just shy of $1.2 million.

The Westgate Las Vegas SuperBook lost nearly $100,000, its worst result ever for the Masters.

And at BetOnline, Dave Mason announced via Twitter his company suffered its biggest futures loss in its 20 year history.

- Don Shapiro, Gambling911.com