The US Open 2016 Golf major will be stage in the Oakmont Country Club, Pennsylvania this week with a field of 156 players vying for the title as well as the chance to join its prestigious roster of past champions.

So who are favorites to lift the US Open Championship Trophy at the end of four rounds of what is expected to be a grueling golf play and who are the dark horses who could spoil the tournament from them.

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Here are the players to watch in the US Open 2016 Golf Championship:

The Favorites

Rory McIlroy

Rory McIlroy won the US Open at Congressional five years ago and now he appears poised for another major title.  He has won in Ireland, finished tied for 4th at the Memorial, and he hasn’t finished worse than T-12 in more than three months.

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Jason Day

Jason Day is the world No. 1 and has won seven times since late July. Day was a US Open runner up twice in 2011 and 2013 and has finished T-9 or better in four of his last five U.S. Open.

Dustin Johnson

David Johnson appears was last year’s runner up and it looks like he is poised to erase his heartbreaking lost in Chambers Bay. Recently he placed third in Ohio and then placed fifth in Memphis, where he had a remarkable 63 at the closing round. Johnson finished in the top-10 of his last seven tournament.

Jordan Spieth

Jordan Spieth is the defending champion but he appears to have issues with his iron proximity. Yet his major performance is impressive with five straight finishes of T-4 or better.

The Dark Horses

Patrick Reed

Patrick Reed has the skills that lends itself well to competing Oakmont Country Club, according to Bleacher Report analysis.  He placed 14th at last year’s U.S. Open and has four PGA Tour wins and top 10s so far in 2016

Branden Grace

Branden Grace is not great at any one particular thing but does enough things to avoid an abysmal round. Grace is excellent at grinding from beyond 30 yards.

Kevin Chapell

Kevin Chappell has emerged as one of the best golfers in the tour. He’s sixth on the money list, has three runner-up finishes in 2016 and has a history of U.S. Open success.