Others capable of victory include Europeans Francesco Molinari, Jon Rahm, Paul Casey and Tommy Fleetwood, and Americans Brooks Koepka, Rickie Fowler and Bubba Watson.
Australians Jason Day, Marc Leishman and 2013 champion Adam Scott, are also capable.
There has been no long-shot winner at Augusta National since 69th-ranked Angel Cabrera collected the Green Jacket in 2009, though even the Argentine's victory was far from a huge shock given his pedigree as a US Open champion two years earlier.