FORT WORTH, Texas — Zach Johnson stood behind the fourth green looking at his club and then the ball that rolled within 4 feet of the hole.
    "I got lucky," Johnson said about his second shot on the 244-yard par 3 — his 13th hole Thursday — after his tee shot went through the green and stopped in a clump of grass.
    Three holes later, Johnson was so deep in a greenside bunker that he couldn't even be seen from the other side of the green until he popped up to watch his blast over the ridge to 2 1/2 feet from the cup.
    Those par-savers were part of a bogey-free 6-under 64 that gave him a one-stroke lead after the first round in the Colonial, where 20-30 mph wind with higher gusts whipped through the big oak trees lining the fairways.
    "Today was great. I got off to a good start, just hit some quality shots. I didn't put myself ever in a position that was too worrisome," Johnson said. "I kept the golf course in front me. I attacked when I could attack. I had a couple of nice saves when I needed it. ... I've got zero complaints."
    Jason Dufner, rookie Harris English, Tom Gillis and Kyle Reifers were tied for second. Dufner won the Byron Nelson Championship last week.