BMW Championship's 'Birdie Of The Year' Rory McIlroy

Rory McIlroy is the world's best golfer when he's on.

He's doing well in the BMW Championship's opening round.

McIlroy started No. 17 tied for the lead at four-under.

Unfortunately, he groved the ball left into the deep rough.

The birdie put McIlroy at five-under and gave him the lead for a few minutes until Brian Harman tied him on No. 17.

Rory will lead the FedEx Cup if he wins this weekend.

Instead of cutting the ball out on the fairway, McIlroy tried to smash his second shot through

Rory McIlroy has the potential to be the most dominating golfer in the world when he is on his game.

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