It was a return six years in the making, and it was a return that perfectly encapsulated Rory McIlroy. Making the trek back to Royal Portrush for The Open Championship -- now as a career grand slam winner -- the Northern Irishman experienced a topsy-turvy day as the hard stuff came easy and the easy stuff came hard.

McIlroy didn't play his best Thursday at Royal Portrush but shot 1-under 70 and is three shots off the 18-hole lead.

Rory McIlroy shot 1 under Thursday at Royal Portrush, a better start than the first time he played the British Open at the Northern Ireland course near home.

Yes. McIlroy debuted at the 2007 British Open as a low amateur. Since then, he has managed one win at the final golf major of the year. McIlroy finally completed the feat at the 2014 British Open, when the tournament was held at the Royal Liverpool Golf Club in Holylake, England.

Six years ago at Royal Portrush, McIlroy, who grew up less than an hour away, hit his opening shot out of bounds on the par-4 first on his way to a quadruple-bogey 8 and a 79. He pulled his tee shot again, this time around, but it settled safely in the left rough.

Rory McIlroy attended the Association of Golf Writers dinner on Tuesday evening and was decked out in green — Masters green.