Rory McIlroy carded an eagle and a triple-bogey on his back nine en route to a 4 under par opening round of 68 at the C-J Cup.
Shane Lowry's 73 leaves him on 1 over.
American Robert Streb heads the field on 11 under going into day 2 in Nevada.
Advertisement
Jonathan Caldwell resumes his challenge at the Andalucia Masters on 1 over par.
The County Down golfer goes into the second round five shots off the lead of Julien Guerrier.
