SAN ANTONIO -- Branden Grace of South Africa fashioned seven birdies in his first 14 holes and settled for a 6-under-par 66 to establish a one-shot lead on Thursday after the morning wave of the first round of the Valero Texas Open.
Will MacKenzie and John Huh were a shot back after 67s in the morning wave played under mostly benign conditions at the TPC San Antonio Oaks Course.
Ten players -- most notably Brooks Koepka and former U.S. Open winner Graeme McDowell of Northern Ireland -- finished their first rounds with 68s, two off Grace's pace.
Grace has won 11 times as a professional, including the 2016 RBC Heritage as his only PGA Tour victory. He was 3-under on the front-nine after four birdies and a bogey and racked up three more birdies to sign for a round that included hitting 13 of 14 fairways and 14 of 18 greens in regulation.