Houston:PGA Tour rookie Zach Johnson continued a terrific stretch of golf with a 4-under 68 and was in a three-way tie for the lead when the second round of the Houston Open was suspended by darkness yesterday. Johnson, who won earlier this month at the BellSouth Classic, overcame a second day of gusty winds and a nearly two-hour weather delay at the Redstone Golf Club in suburban Houston. With 36 players to finish their second round early Saturday, Johnson, Steve Stricker and Steve Loweryâ€”all Americansâ€”were at 5-under 139 after two rounds. The wet conditions brought out some unusual golf fansâ€”turtlesâ€”yesterday at the Redstone Golf Club in Houston, Texas. During the afternoon, a two-hour delay weather halted play with 78 golfers still on the course. Jason Bohn had the shot of the day on Friday when he holed his bunker shot on the 13th hole for birdie. Bohn was 1-under par through 13 holes when his round was cut short in the late afternoon. U-S veteran Hal Sutton finished his round of 1-over-par 73 and was at 2-under through two rounds. After a double bogey on the 17th holeâ€”Steve Lowrey's eighth holeâ€”the American finished with a flourish in the twilight on Friday, making three consecutive birdies for his 69. In nine events so far this year, he's recorded only one finish in the top 25. Zach Johnson had played 10 holes and was at 5-under for the tournament when bad weather halted play. When it resumed, he promptly birdied No. 11, rolling in a 57-foot (17.1-meter) putt. He bogeyed the par-3 13th and made it back with a birdie at 16. He bogeyed 17 and finished with a par on 18 in near darkness. The 28-year-old Johnson was the 2003 player of the year on the developmental Nationwide Tour. He has been particularly impressive his last few times out, finishing 13th at the Honda Classic six weeks ago, sixth at Bay Hill the following week and then winning the BellSouth. He's 15th on the U-S money list this year with almost $1.16 million.