(CNN) -- American Chad Campbell produced the best front nine on Friday morning to open up a commanding five-stroke Masters lead before finally ending his second round at Augusta with a two-under-par 70.
Campbell continues to blaze a trail in the second round of the Masters as he seeks a first major victory.
The 34-year-old Texan, who kicked off the tournament with a seven-under 65 which had promised to be so much better, before he bogeyed the last two holes, birdied the second with a sublime pitch to three-feet.
A two on the 240-yard fourth for the second day running -- his first round started with a Masters record five successive birdies -- took him back to nine-under and then he birdied the long eighth as well for an outward 33. The 495-yard 10th held no fears for him either as he birdied that too to improve to 11-under.
However, with the wind gusting and swirling Campbell began to make mistakes and when he three-putted the 12th for a bogey -- his lead over Kenny Perry, Jim Furyk and Todd Hamilton was done to three shots.
Campbell, who has played in the last three U.S. Ryder Cup teams, had his third bogey in seven holes on the 17th, but made a superb downhill 30-footer on the last for 70 to leave him on nine-under-par.
That could have implications for the cut mark because, under the rule whereby anybody 10 shots or fewer off the lead qualifies for the final 36 holes, those on two-over-par were now no longer safe.
Perry was chasing his compatriot on seven-under with four holes still left to play.
Chasing the first major of his career, he was runner-up to Shaun Micheel in the 2003 US PGA championship and third in the 2006 Masters, Campbell has not had a top-10 finish on the PGA Tour in his last seven starts.