America's Kevin Chappell finally got to grips with the windy conditions at the Valero Texas Open to claim the outright lead on day three as he chases his first PGA Tour victory.

The 30-year-old, who has six runners-up finishes to his name, was just one shot off the lead after Friday but an outward 38 appeared to have left him struggling.

However, three birdies in his final five holes in a bogey-free back nine lifted him to the top of the leaderboard on eight under after a round of 71.

South Africa's Branden Grace, a renowned good wind player, shot 70 to move to seven under alongside another American John Huh.

The group one shot further back included Ryan Palmer, who carded an impressive 68 on a testing day on the AT&T Oaks Course in San Antonio, and Scotland's Martin Laird after a 71.

Overnight joint leaders Tony Finau and Bud Cauley were also in that chasing pack having rallied late on in their rounds after difficult starts.

Both carded two-over 74s, still leaving them well-placed just two behind Chappell.

Seamus Power and Graeme McDowell are both two over par after disapppointing rounds of 74 and 76 respectively.