US PGA Championship: Four players who can halt Rory McIlroy’s quest for Calendar Slam

Rory McIlroy ended his major drought at the Masters last month (Picture: Getty)Just like London buses, Rory McIlroy will hope that after waiting almost 11 years to win his fifth major, another one may be right around the corner at this week’s US PGA Championship.After years of close calls and heartbreak, McIlroy finally lifted his major hoodoo with a dramatic playoff victory at the Masters last month to become only the sixth golfer in history to complete the career Grand Slam.The manner o