Jason Day enters Masters week as the betting favorite, but the big money is backing defending champion Jordan Spieth.
More money has been bet on Spieth than any golfer at the Westgate SuperBook in Las Vegas, including a $9,000 bet placed in January at 5-1 odds. As of Sunday afternoon, that was the largest Masters bet the SuperBook had taken.
Still, Day, at 7-1, is the favorite, followed by Spieth at 15-2 and Rory McIlroy at 8-1. Two-time champion Bubba Watson and 2013 champ Adam Scott are 12-1, with Dustin Johnson, Rickie Fowler and Phil Mickelson next, each at 15-1.
Mickelson, another two-time Masters champion, has attracted the most bets, twice as many as Spieth, at the SuperBook. Spieth is not even in the top five in number of wagers, but he is tops in money by a wide margin.
"Spieth continues to attract the larger wagers, nickels ($500) and dimes ($1,000)," said SuperBook oddsmaker Jeff Sherman, a golf specialist.
Day, Spieth and McIlroy had been co-favorites for several weeks before Sherman made Day the solo favorite last week after the world's No. 1-ranked player won back-to-back tournaments, including the Dell Match Play in late March.
"He's got that feel of how he ended last year, when he won the PGA Championship," Sherman said of Day. "He's got that aura about him right now and is slightly superior to Speith or McIlroy at this point."
William Hill's Nevada sportsbook took a $7,000 bet on Day 13-2. William Hill also took four-figure wagers on Fowler ($3,000 at 18-1), Henrik Stenson ($3,000 at 22-1) and Sergio Garcia ($2,000 at 50-1).
Tiger Woods, a four-time Masters champion, will not tee it up this week. He is recovering from back surgery and will miss the Masters for the second time in the past three seasons. All bets on Woods at the SuperBook -- which included a $500 wager at 100-1 placed last week -- will be refunded.
Woods' absence hasn't affected the amount wagered on the tournament. Sherman said the SuperBook is on record pace for Masters money. The SuperBook, for the first time, is offering individual odds on every golfer in the field. Tournament propositions, such as the winning score, and head-to-head matchups will be posted Monday evening at the SuperBook.