Rory McIlroy did not take missing the cut at the RBC Canadian Open lightly, as he expressed his concerns about his game ahead the upcoming US Open.

Golf superstar Rory McIlroy sparked quite a bit of controversy last month when he made the decision not to speak to the media after all four rounds of the PGA Championship. And it sounds like the PGA Tour has some "concerns" about that move from the superstar.

After a two-week hiatus from the PGA Tour following the PGA Championship, Rory McIlroy returned to action this week at the RBC Canadian Open—but his time in the tournament was short-lived. McIlroy struggled mightily over both rounds,