The New Zealand golfer Danny Lee finished his second round with three birdies to surge into a share of the lead at the latest PGA tour event in Texas.
Lee carded a six under par 64 to climb from a share of 33rd to the a four way tie at the top with American's Webb Simpson, Kevin Kisner and Scott Piercy.
The New Zealander shot seven birdies and one bogey in the near flawless round.
Lee finished fifth at the Byron Nelson Classic last week.
Lee said "I really wanted to play well last week and I did, I was just struggling all year and just trying to find my game."
"I think I've finally got it and my head is in a good place right now and I'm just looking forward to the next couple of days."
Jordan Spieth avoided missing three consecutive cuts for the first time in his career when he turned his game around to card a two-under-par 68.
The Texan bogeyed three of his first five holes at Colonial Country Club, but a 35-foot birdie putt at his sixth hole turned the defending champion's fortunes around, setting the stage for four more birdies in a five-hole stretch on his inward half.
So instead of ending the day answering questions about what was wrong with his game, Spieth headed home with his sights set on clawing back the four strokes to the leaders.
The former world number one ended the round equal 11th and credited his putting touch with getting him back on track.
-RNZ & Reuters