Mark Hensby rolled in a 14-foot birdie putt at the last to complete a round of 3-under-par 69. Luke Donald is also at 3 under through 14 holes.
Bad weather has been a problem on the PGA Tour this year and there was no exception for the season's first major. The morning rain ultimately forced a decision to have players go off the first and 10th tees. Play will resume Friday morning at 9:45 a.m. ET.
Defending champion Phil Mickelson bogeyed the first but countered with back-to-back birdies from the par-5 second. He dropped another shot at the par-4 fifth after he missed the green with his approach, but the lefthander recovered with a birdie at the par-5 eighth and another birdie at the 10th. Mickelson stands at 2 under par through 11 holes.
Vijay Singh played his approach to 4 feet for a birdie at the par-4 third and added a birdie at the eighth to reach 2 under. The 2000 Masters champion then birdied the 10th, but suffered a three-putt bogey at the 11th.
The other half of the big four struggled on Thursday.
Tiger Woods, who is seeking his fourth green jacket, played the back side first and stumbled early with a bogey at the 11th. Woods then reached the green in two at the par-5 13th but was left with a long, downhill putt for eagle. He rolled his putt across the green and watched as his ball carried into the water.
Woods walked off with a bogey but got that shot back with a birdie at the par-5 15th. The 29-year-old then hit a tremendous drive to the par-4 first and then punched a wedge that hit the flag.
The ball trickled back into a greenside bunker and Woods was unable to get up and down for another bogey. He then hit a terrible tee shot at the second but managed to save par. A par at the third left Woods at 2 over through 12.
Ernie Els also had his share of trouble and stands at 3 over through 11 holes.