A fast finish propelled America's Chez Reavie to a one-shot lead following the opening round of the Fortinet Championship in California.
Starting on the back nine, Reavie was one over through his first six holes before scoring back-to-back birdies to head into the turn with some positive momentum.
A birdie on the first then opened the floodgates for the 39-year-old as he picked up five more shots en route to carding a seven-under 65.
Hot on his heels is compatriot Cameron Tringale and Canadian Adam Hadwin, who both entered the clubhouse a stroke back after Thursday's session.
Americans Max Homa and Nate Lashley feature among a six-strong chasing pack tied for fourth on five under.
Scotland's Russell Knox leads the British contingent on three under - one stroke ahead of Englishmen Danny Willett, Aaron Rai, David Skinns and Callum Tarren.
