Jon Rahm took some advice from legend Jack Nicklaus and it paid off with a seven-under par 64 in his first professional round to seize the US PGA National lead. Rahm, a 21-year-old Spaniard, made a bogey-free start to his pro career at Congressional Country Club to grab a one-stroke lead over Venezuela's Jhonattan Vegas at the Tiger Woods-hosted tournament. South Africa's Ernie Els, who won one of his four major titles at Congressional in the 1997 US Open, was in a pack of eight sharing third on 66.
