IRVING, Texas, May 11 (UPI) -- Steve Lowery and Adam Scott both shot 5-under 65 Thursday and share the lead after one round of the Byron Nelson Golf Championship at Irving, Texas.
Lowery was bogey-free over 18 holes, while Scott's round featured seven birdies and two bogeys.
Bob Estes and Brett Wetterich head into the second round tied for third place at 4-under 66.
Bubba Dickerson -- who was tied for the lead with Scott and Lowery late in his round -- bogeyed two of his final four holes and finished at 3-under 67, tied with nine other players, including Dean Wilson, Tom Herron and Bo Van Pelt.
Defending champion Ted Purdy is tied with 15 players -- including Vijay Singh and Jim Furyk, last week's winner of the Wachovia Championship at Charlotte -- at even-par 70.
Two-time Masters champion Phil Mickelson and Tiger Woods are not playing in this year's Byron Nelson tournament.