Published Friday, 08 August 2014
McIlroy watches his tee shot on the seventh hole at Valhalla. (© Getty)
The world number one briefly dropped three shots off the pace when he bogeyed the par-four 12th, his third hole of the day, but bounced back to card a second round of 67 at Valhalla.
McIlroy's 12th successive sub-par score gave him a nine-under-par halfway total of 133, two shots ahead of American Ryan Palmer.
The Holywood man is seeking his second consecutive major and third consecutive victory, having won The Open Championship and World Golf Championships-Bridgestone Invitational.
Play had got underway in torrential rain on Friday morning but was suspended after 20 minutes. The rain eased enough for tournament officials to announce play would restart after a delay of 45 minutes.
McIlroy said of the soggy conditions: "The golf course was pretty wet so the ball is not running anywhere and whenever it's like that and no rain coming down it is very playable and you could make a score."
He added: "I didn't get off to the best of starts, but I righted the ship well and caught fire a little bit round the turn and am really happy with four under par.
"I'm feeling good about my game, I'm confident and hitting the ball well for the most part - not quite as well as I did yesterday, but still in control of my game and my emotions and I will need to do that over the weekend as well."
© UTV News