PONTE VEDRA BEACH, Fla. - Martin Kaymer stopped thinking, started swinging, and played his way into the record book Thursday in The Players Championship.

Kaymer missed only two fairways. He putted for birdie on all but one hole. The former PGA champion finished with four consecutive birdies to become only the fourth player to shoot 9-under-par 63 on the Stadium Course at the TPC Sawgrass. He has a 2-shot lead over Russell Henley.

There were 28 rounds in the 60s, which made the score by Adam Scott look even worse. With another chance - his best one yet - to get to No. 1 in the world for the first time, Scott finished with a pair of double bogeys from shots in the water and signed for a 77. It was his highest opening round in The Players since his first trip in 2002.

Kaymer had a 29 on the back nine, the first player in the 32-year history at Sawgrass to break 30 on either nine.

Roberto Castro also opened with a 63 last year. The only others with 63 were Greg Norman in the first round in 1994 and Fred Couples in the third round in 1992.