Las Vegas oddsmakers are focused on Jordan Spieth and Rory McIlroy for the remaining two majors of the 2015 season.
McIlroy and Spieth, Nos. 1 and 2, respectively, in the Official World Golf Ranking, are 5-1 co-favorites to win the 144th Open Championship next month at St. Andrews,. However, McIlroy is the favorite to win one of the next two remaining majors.
According to Westgate Las Vegas Superbook, McIlroy is a 2-1 pick to win the Open Championship or PGA Championship, and his odds to win both are 20-1.
For Spieth, who won the Masters and the U.S. Open this year, the odds to win one of the two remaining majors are 9-4. To win all four and achieve the unprecedented modern Grand Slam, he is a 25-1 choice.
Only three players in modern history have had a chance to go to the Open Championship with the Grand Slam still in play: Tiger Woods in 2002, Jack Nicklaus in 1972 and Arnold Palmer in 1960.
None of those three won the Open Campionship. Woods finished T-28 when Ernie Els won his first Open Championship. Nicklaus and Palmer finished second by a shot, Nicklaus to Lee Trevino and Palmer to Kel Nagle.
Woods, the longtime World No. 1 who owns 14 major championships, is a 60-1 pick to win at St. Andrews. He has slipped to No. 205 in the OWGR.