ARDMORE, Penn. -- Despite playing under 7,000 yards with no wind and rain-softened conditions, Merion Golf Club remained a difficult test in the first round of the U.S. Open on Thursday.
American Phil Mickelson was the early clubhouse leader after shooting a three-under-par 67, with only Nicolas Colsaerts of Belgium, who fired a 69, the only other player to better par from the early finishers.
Commentators and some leading players, including British Open champion Ernie Els, had predicted that birdies would fly at Merion, which has not hosted a major in 32 years, amid concerns the modern game had outgrown it.
"I think that (people) in that commentary box have never given this golf course enough respect," said Englishman Ian Poulter, who started out Thursday morning with three birdies in a row after teeing off from the 11th before finishing with 71.
"They were joking around laughing at 63s and 62s and just look at the board. I mean they need to respect this golf course. It's brutal.
"The long holes are severely long. Yes, we're making birdies on those short holes, but look what we have to contend with out there on those long holes. It's not easy."
Rickie Fowler, 24, playing his fifth U.S. Open, said the deep, punishing rough was proving to be a strong defense.
"There's some nasty rough out there," said Fowler, who also shot a one-over 70. "It is short on the card, and it was playing soft today, which makes it play longer.
"I actually think this course plays more like a 7,400 or 7,500 yard golf course...
"If you drive the ball well out here, you can attack it right now with the greens being receptive.
"But you're not able to play out of the rough. You're not able to get much more than maybe seven-iron out of the first cut off the fairway, and then once you get out a little deeper, you've got wedge in your hand."