As we saw by Rory McIlroy's emotional reaction to winning the Masters and completing the career Grand Slam, the guy was under an insane amount of pressure to finally get the job done. McIlroy admitted he felt "pure relief" after winning the playoff against Justin Rose to make (more) golf history.

The Masters is still fresh in the minds of golf fans. And now the PGA Championship is next to the plate with possibilities just as compelling.

Jordan Spieth currently leads the contenders with three majors, but there are a handful of other players who could eventually win the career Grand Slam.