FORT WORTH — Zach Johnson shot a bogey-free 6-under 64 on Thursday to take a one-stroke lead after the first round of the Colonial.
Johnson opened his round with a 40-foot birdie putt on his first hole, No. 10. After blasting from a greenside bunker at No. 12 to save par, he had four birdies in a row on a day when gusty wind whipped through the big oaks lining the fairways at Hogan's Alley.
Johnson, the 2007 Masters champion, is winless since his victory in the 2010 Colonial. That year, he shot 65-66-64-64 to finish at a tournament-record 21-under 259.
Jason Dufner, the Byron Nelson Championship winner Sunday, was a stroke back along with PGA Tour rookie Harris English, Tom Gillis and Kyle Reifers.