Good luck trying to pick the favorite for The Open Championship this year. Even Las Vegas is unsure.

Jason Day, Rory McIlroy, and Jordan Spieth are all tied atop the board at 8-to-1 odds to capture the Claret Jug, according to VegasInsiders. And right on their heels is Dustin Johnson at 17/2 odds. Clearly there is plenty to be decided when play gets underway at Royal Troon in Scotland on Thursday morning.

Not to be forgotten in the discussion is Zach Johnson, who outlasted Spieth in a playoff and ended his hunt for a sweep of the majors at this event last year. He currently sits at 55-to-1 odds, same as Bubba Watson and Jim Furyk.

Reigning Masters champion Danny Willett is listed at 30-to-1 odds to capture his second major of the year. Take a full look at the odds, accurate as of 10 p.m. Sunday ET.

• Jason Day, 8/1
• Rory McIlroy, 8/1
• Jordan Spieth, 8/1
• Dustin Johnson, 17/2
• Adam Scott, 20/1
• Justin Rose, 24/1
• Henrik Stenson, 25/1
• Sergio Garcia, 25/1
• Rickie Fowler, 27/1
• Branden Grace, 29/1
• Danny Willett, 30/1
• Louis Oosthuizen, 33/1
• Hideki Matsuyama, 35/1
• Phil Mickelson, 35/1
• Shane Lowry, 35/1
• Brooks Koepka, 40/1
• Lee Westwood, 40/1
• Matthew Fitzpatrick, 50/1
• Paul Casey, 50/1
• Bubba Watson, 55/1
• Jim Furyk, 55/1
• Zach Johnson, 55/1
• Brandt Snedeker, 60/1
• Martin Kaymer, 60/1
• Patrick Reed, 65/1
• Charl Schwartzel, 70/1
• Marc Leishman, 70/1
• Matt Kuchar, 70/1
• Graeme McDowell, 75/1
• Justin Thomas, 75/1
• Tiger Woods, 80/1
• Bernd Wiesberger, 85/1
• Jimmy Walker, 85/1
• Kevin Na, 95/1
• Victor Dubuisson, 95/1
• Billy Horschel, 100/1
• Chris Kirk, 110/1
• Keegan Bradley, 110/1
• Bill Haas, 120/1
• Ian Poulter, 120/1
• Joost Luiten, 120/1
• Ryan Moore, 120/1
• Webb Simposon, 120/1
• Lasse Jensen, 130/1
• Charley Hoffman, 150/1
• Hunter Mahan, 150/1
• Jamie Donaldson, 150/1
• Brian Gay, 170/1
• Matt Jones, 170/1
• Thorbjorn Olesen, 170/1
• J.B. Holmes, 190/1
• Miguel Angel Jimenez, 190/1
• Clement Sordet, 220/1
• Russell Henley, 220/1
• Stephen Gallacher, 250/1
• Steve Stricker, 250/1
• Zander Lombard, 250/1
• Haydn Porteous, 350/1
• Seung-Yul Noh, 350/1
• Anthony Wall, 400/1
• Marco Dawson, 400/1
• Mark Calcavecchia, 400/1
• Nick Cullen, 450/1
• Rod Pampling, 450/1
• Hideto Tanihara, 500/1
• Kodai Ichihara, 500/1
• Mark O’Meara, 500/1
• Phachara Khongwatmai, 500/1
• Sandy Lyle, 500/1
• Sang-Hee Lee, 500/1
• Shugo Imahira, 500/1