Justin Rose made seven birdies and an eagle during a torrid 10-hole stretch for an opening 7-under 65, giving him a 4-shot lead Thursday in conditions that might only get tougher the rest of the way.

Brian Harman, the last player to get into the 88-man field, and Hideki Matsuyama were wrapping up their rounds of 69 about the time Rose began on a course that was dry and crusty, on greens that were so fast there were splotches of brown.

Among those at 70 were former Masters champion Patrick Reed and Masters newcomer Will ZalatorisJordan Spieth overcame a triple bogey from the trees on No. 9 and got a huge break when his chip on the 15th banged into the pin for eagle instead of running down into the water. He shot 71.

Rose shot 65 on a day so tough only 12 players broke par, and the average score was 74.5.

British Open champion Shane Lowry chipped from the back of the 15th green into the water in front of the green. He escaped with bogey and managed a 71. U.S. Amateur champion Tyler Strafaci hit a 60-foot putt from behind the ninth green that wound up 75 feet away on the other side.

Defending champion Dustin Johnson, who set the record last year at 20-under 268, failed to break par for the first time since the opening round in 2018. He three-putted for double bogey on the 18th for a 74.