Angel Cabrera shot 2-under 34 on the front nine Sunday to grab a 2-stroke lead with nine holes remaining at the 77th Masters.
Cabrera, the 2009 winner, stands at 8-under par for the championship after stumbling to a bogey on the 10th after driving into the trees.
Brandt Snedeker, who shared the third-round lead with Cabrera, had two birdies and two bogeys in a front-nine 36. He also bogeyed the 10th to dip into a tie for second at minus-6.
Australian Jason Day and Adam Scott are also at minus-6. Day was 1-under after 11 holes and Scott was even-par through 10 holes.
Thorbjorn Olesen is 5-under after 16 holes and has jumped into a tie for fifth place at minus-5. He was joined there by Marc Leishman, who is even-par after 10 holes.
John Huh is the clubhouse leader at 2-under-par 286. He carded a 4-under 68 on Sunday at Augusta National.
Cabrera 2-putted for birdie on the second and stuffed his approach within two feet at the seventh. He kicked that in for birdie and a 2-stroke lead over Day.
Snedeker joined Day at minus-8 with a birdie at the second, but faltered to bogeys at four and five. Snedeker pitched his third to five feet at the eighth and rolled that in for birdie to get back to minus-7. Snedeker failed to get up and down for par on the 10th as he dipped to minus-6 and is still two back.
Tiger Woods tripped to bogeys on the seventh and ninth to dip to 1-under par. The four-time champion fought back with birdies at nine and 10. He parred his next two, but it five off the pace with six holes to go.
Former PGA Champion David Toms fired a 5-under 67 to finish the tournament at 1-under 287. He was joined there by Ernie Els (69), Dustin Johnson (70) and Fred Couples (71).
Rory McIlroy (69) ended at 2-over 290 alongside Michael Thompson, whose 67 matched the low round of the day, and 2011 champ Charl Schwartzel (73).
Three-time champion Phil Mickelson closed with a 1-over 73 to complete his tournament at 9-over 297.
A light rain is falling and it is expected to increase in intensity as the day continues.