(Photo credit: Joe Rondone/The Republic / USA TODAY NETWORK)
Thomas Bjorn of Denmark fired seven birdies during a bogey-free 64 on Friday to lead the Invited Celebrity Classic at Irving, Texas.
Bjorn holds a one-shot lead over a quartet of players at Las Colinas Country Club.
Jerry Kelly, Clark Dennis, England's Paul Broadhurst and South Korea's Y.E. Yang were in the group who shot 65.
Bjorn had four birdies on the fro