American journeyman Jason Dufner held a two-shot lead following the second round of the Transitions Championship Friday after equalling the low round of the day with a flawless five-under-par 66. Dufner, who lost last year's PGA Championship in a playoff to rookie Keegan Bradley, birdied three of his first five holes en route to a 10-under total of 132. Ireland's Padraig Harrington (73), who was the overnight leader after setting the course record with a 61 Thursday, was two shots back after mixing three bogeys with a birdie. The Dubliner was tied in second place with American William McGirt (68), while England's Luke Donald, the world No. 2, is one of five players sitting three shots off the pace. Donald can reclaim his spot at the top of the world rankings from Northern Ireland's Rory McIlroy with a win this week. Spain's Sergio Garcia (68) is also well-placed for a weekend push sitting just four shots back of Dufner along with Australian John Senden (70) and Americans Jim Furyk (70) and Kenny Perry (70). Among those missing the cut, which was set at one-under 141, were Japan's Ryo Ishikawa, Colombian Camilo Villegas and Masters champion South African Charl Schwartzel, who followed up a five-over 76 Thursday with a two-over 73 Friday. Yani Tseng ahead Top-ranked Yani Tseng shot a 2-under 70 Friday to take a one-stroke over five players after the second round of the LPGA Founders Cup. A day after playing a seven-hole stretch on the back nine in 7-under, the Taiwanese star opened with nine pars on the same nine. She had three birdies and a bogey on her final nine to reach 9-under 135 on another perfect day at Wildfire Golf Club. Second-ranked Na Yeon Choi was second along with fellow South Korean players I.K. Kim and Meena Lee and Japan's Ai Miyazato and Mika Miyazato. Kim had a 66, Lee and Mika Miyazato shot 67, and Ai Miyazato had a 68. Paula Creamer (68) was two strokes back along with defending champion Karrie Webb (69), Karen Sjodin (68), Inbee Park (69), Jiyai Shin (71) and Hee Young Park (72). Park was level with Tseng for the first-round lead after a 65.