CROMWELL, Connecticut: American Patrick Cantlay became the first amateur to shoot a 60 on the PGA Tour after blitzing the TPC River Highlands course in the second round of the Travelers Championship Friday. Having to play 36 holes after Thursday was washed out, the 19-year-old opened with a 67 and then exploded with a second round 10-under to move to a 13-under total of 127 under overcast skies. The spectacular round of eight birdies and an eagle left Cantlay with a four-stroke lead over a clutch of players tied for second after play was halted with about half the field yet to finish their second rounds. Americans Webb Simpson, Vaughn Taylor and D.J. Trahan were in the club-house tied for second on nine-under with Brazilian Alexandre Rocha. Argentine Andres Romero was also nine-under after five holes of his second round. Cantlay, who took low amateur honors at the US Open, had a 30 on the front nine and another 30 coming in, kicking the round off with a birdie at the first and consecutive birdies at five, six, eight and nine. His back nine was quiet until an eagle at the par-five 13th, his second of the day there, sparked a run of closing birdies at 14, 17 and 18. Cantley finished his round with a sublime eight-iron approach from 152 yards that spun back to settle within three feet of the 18th cup. Tseng clings to lead World No. 1 Yani Tseng of Taiwan briefly lost her lead after a double bogey but battled back to reclaim a one-stroke edge after Friday's rainy second round of the LPGA Championship. Tseng fired a two-under par 70 to stand on eight-under par 136 after 36 holes in the year's second major women's championship. She finished second to American Stacy Lewis in the first major, the Kraft Nabisco, back in April. “I feel a little bit disappointed in my round, but I hung in there,” Tseng said. US veteran Pat Hurst was one stroke back after a second-round 67 with South Korean Hee Young Park, American Morgan Pressel and Finland's Minea Blomqvist sharing third on 138.