The 31-year-old American sank a 10-footer at the par-five eighth, his penultimate hole of the day, before draining a 24-footer from the fringe at the par-three ninth to card a seven-under 65 at the Golf Club of Houston in Humble, Texas. Johnson, a nine-time winner on the PGA Tour, was delighted with his start after mixing an eagle and seven birdies with two bogeys. More...